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Add source.regexp.python rules
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‎extensions/python/package.json‎

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"language": "python",
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"scopeName": "source.python",
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"path": "./syntaxes/Python.tmLanguage"
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},{
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"scopeName": "source.regexp.python",
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"path": "./syntaxes/Regular Expressions (Python).tmLanguage"
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}]
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}
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}

‎extensions/python/syntaxes/Regular Expressions (Python).tmLanguage‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>comment</key>
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<string>Matches Python's regular expression syntax.</string>
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<key>fileTypes</key>
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<array>
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<string>re</string>
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</array>
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<key>foldingStartMarker</key>
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<string>(/\*|\{|\()</string>
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<key>foldingStopMarker</key>
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<string>(\*/|\}|\))</string>
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<key>name</key>
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<string>Regular Expressions (Python)</string>
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<key>patterns</key>
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<array>
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<dict>
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<key>match</key>
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<string>\\[bBAZzG]|\^|\$</string>
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<key>name</key>
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<string>keyword.control.anchor.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>\\[1-9][0-9]?</string>
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<key>name</key>
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<string>keyword.other.back-reference.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>[?+*][?+]?|\{(\d+,\d+|\d+,|,\d+|\d+)\}\??</string>
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<key>name</key>
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<string>keyword.operator.quantifier.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>\|</string>
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<key>name</key>
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<string>keyword.operator.or.regexp</string>
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</dict>
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<dict>
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<key>begin</key>
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<string>\(\?\#</string>
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<key>end</key>
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<string>\)</string>
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<key>name</key>
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<string>comment.block.regexp</string>
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</dict>
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<dict>
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<key>comment</key>
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<string>We are restrictive in what we allow to go after the comment character to avoid false positives, since the availability of comments depend on regexp flags.</string>
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<key>match</key>
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<string>(?&lt;=^|\s)#\s[[a-zA-Z0-9,. \t?!-:][^\x{00}-\x{7F}]]*$</string>
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<key>name</key>
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<string>comment.line.number-sign.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>\(\?[iLmsux]+\)</string>
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<key>name</key>
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<string>keyword.other.option-toggle.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>(\()(\?P=([a-zA-Z_][a-zA-Z_0-9]*\w*))(\))</string>
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<key>name</key>
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<string>keyword.other.back-reference.named.regexp</string>
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</dict>
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<dict>
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<key>begin</key>
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<string>(\()((\?=)|(\?!)|(\?&lt;=)|(\?&lt;!))</string>
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<key>beginCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.regexp</string>
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</dict>
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<key>2</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.assertion.regexp</string>
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</dict>
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<key>3</key>
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<dict>
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<key>name</key>
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<string>meta.assertion.look-ahead.regexp</string>
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</dict>
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<key>4</key>
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<dict>
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<key>name</key>
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<string>meta.assertion.negative-look-ahead.regexp</string>
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</dict>
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<key>5</key>
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<dict>
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<key>name</key>
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<string>meta.assertion.look-behind.regexp</string>
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</dict>
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<key>6</key>
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<dict>
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<key>name</key>
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<string>meta.assertion.negative-look-behind.regexp</string>
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</dict>
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</dict>
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<key>end</key>
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<string>(\))</string>
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<key>endCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.regexp</string>
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</dict>
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</dict>
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<key>name</key>
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<string>meta.group.assertion.regexp</string>
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<key>patterns</key>
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<array>
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<dict>
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<key>include</key>
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<string>$self</string>
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</dict>
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</array>
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</dict>
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<dict>
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<key>begin</key>
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<string>(\()(\?\(([1-9][0-9]?|[a-zA-Z_][a-zA-Z_0-9]*)\))</string>
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<key>beginCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.regexp</string>
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</dict>
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<key>2</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.assertion.conditional.regexp</string>
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</dict>
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<key>3</key>
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<dict>
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<key>name</key>
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<string>entity.name.section.back-reference.regexp</string>
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</dict>
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</dict>
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<key>comment</key>
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<string>we can make this more sophisticated to match the | character that separates yes-pattern from no-pattern, but it's not really necessary.</string>
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<key>end</key>
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<string>(\))</string>
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<key>name</key>
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<string>meta.group.assertion.conditional.regexp</string>
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<key>patterns</key>
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<array>
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<dict>
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<key>include</key>
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<string>$self</string>
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</dict>
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</array>
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</dict>
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<dict>
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<key>begin</key>
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<string>(\()((\?P&lt;)([a-z]\w*)(&gt;)|(\?:))?</string>
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<key>beginCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.regexp</string>
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</dict>
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<key>3</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.capture.regexp</string>
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</dict>
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<key>4</key>
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<dict>
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<key>name</key>
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<string>entity.name.section.group.regexp</string>
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</dict>
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<key>5</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.capture.regexp</string>
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</dict>
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<key>6</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.no-capture.regexp</string>
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</dict>
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</dict>
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<key>end</key>
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<string>(\))</string>
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<key>endCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.group.regexp</string>
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</dict>
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</dict>
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<key>name</key>
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<string>meta.group.regexp</string>
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<key>patterns</key>
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<array>
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<dict>
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<key>include</key>
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<string>$self</string>
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</dict>
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</array>
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</dict>
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<dict>
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<key>include</key>
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<string>#character-class</string>
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</dict>
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</array>
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<key>repository</key>
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<dict>
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<key>character-class</key>
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<dict>
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<key>patterns</key>
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<array>
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<dict>
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<key>match</key>
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<string>\\[wWsSdDhH]|\.</string>
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<key>name</key>
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<string>constant.character.character-class.regexp</string>
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</dict>
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<dict>
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<key>match</key>
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<string>\\.</string>
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<key>name</key>
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<string>constant.character.escape.backslash.regexp</string>
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</dict>
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<dict>
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<key>begin</key>
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<string>(\[)(\^)?</string>
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<key>beginCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.character-class.regexp</string>
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</dict>
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<key>2</key>
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<dict>
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<key>name</key>
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<string>keyword.operator.negation.regexp</string>
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</dict>
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</dict>
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<key>end</key>
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<string>(\])</string>
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<key>endCaptures</key>
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<dict>
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<key>1</key>
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<dict>
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<key>name</key>
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<string>punctuation.definition.character-class.regexp</string>
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</dict>
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</dict>
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<key>name</key>
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<string>constant.other.character-class.set.regexp</string>
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<key>patterns</key>
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<array>
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<dict>
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<key>include</key>
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<string>#character-class</string>
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</dict>
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<dict>
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<key>captures</key>
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<dict>
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<key>2</key>
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<dict>
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<key>name</key>
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<string>constant.character.escape.backslash.regexp</string>
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</dict>
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<key>4</key>
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<dict>
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<key>name</key>
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<string>constant.character.escape.backslash.regexp</string>
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</dict>
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</dict>
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<key>match</key>
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<string>((\\.)|.)\-((\\.)|[^\]])</string>
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<key>name</key>
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<string>constant.other.character-class.range.regexp</string>
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</dict>
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</array>
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</dict>
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</array>
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</dict>
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</dict>
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<key>scopeName</key>
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<string>source.regexp.python</string>
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<key>uuid</key>
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<string>DD867ABF-1EC6-415D-B047-687F550A1D51</string>
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</dict>
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</plist>

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