Fix Bash function list missing functions after a bare "#" comment line - #18527

Summary

Fixes #18174.

In the Bash function-list parser (PowerEditor/installer/functionList/bash.xml), the single-line comment part of commentExpr is:

(?-s:(?:^\x23[^!]|^\h*\x23|\h+\x23).*$)

On a line containing only #, [^!] (meant to exclude a #! shebang) matches the line break, so .*$ swallows the next line. If that line is a function header, the function is missing from the Function List:

#
# exit with error message
#
errorExit()     # <- swallowed by the comment on the line above, not listed
{
	exit 5
}

This only happens with LF line endings (typical for shell scripts). With CRLF, [^!] consumes the \r and the \n stays intact, so the function is found.

Fix

Replaced [^!] with the zero-width negative lookahead (?!!), which still rejects #! but does not consume any character. No other part of the expression changes.

Test plan

• Extended PowerEditor/Test/FunctionList/bash/unitTest with a function preceded by a bare-# comment block; updated unitTest.expected.result.
• Full Function List test harness (unitTestLauncher.ps1): all 46 tests pass.
• notepad++.exe -export=functionList -lbash on the LF example from the issue: errorExit is now listed (before: nothing).

Note: with core.autocrlf=true (as in CI) the test file is checked out with CRLF, where this bug doesn't occur, so the new test case documents the scenario rather than guarding against regressions.

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