Add a simple extended error message (#4646)#5568

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christianbender:fixed_#4646

Commits on Jul 1, 2018

simple extended error message
Christian Bender
committed

Commits on Jul 3, 2018

changed mechanism
Christian Bender
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Commits on Jul 4, 2018

add regex-method and tidy up the code
Christian Bender
committed
removed some println`s
Christian Bender
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modified the regex expression
Christian Bender
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modified the regex expression for proper error message
Christian Bender
committed