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Use custom word boundary matchers #65
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The regexp engine and the shell grammar don't agree on what comprises
a “word boundary”. This leads to problems where a command or path
ending in a shell keyword would be interpreted as that keyword.
This change replaces `\b` word boundary matchers with lookahead/-behind
matchers on whitespace, line breaks, and command separators (";" and "&").
It also eliminates ad-hoc custom word boundaries, where subsets of [-=/]
were pre- or appended to some word boundaries,
which fixed some similar problems.
This was referenced Jan 10, 2017
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Requirements
Description of the Change
This is a continuation of #35, with a fixed spec.
Alternate Designs
N/A
Benefits
See #35.
Possible Drawbacks
N/A
Applicable Issues
Fixes #52
Supersedes and closes #35
Thanks to @mkhl for the initial PR.