Fix invalid escape sequences in regex strings#299
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Use raw strings (r"...") to avoid SyntaxWarning for \d, \w, and \[ which will become SyntaxErrors in future Python versions.
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Summary
r"...") to fixSyntaxWarningfor\dand\winrunner/sensei.pySyntaxWarningfor\[and\dinlibs/colorama/ansitowin32.pyThese sequences currently fall back to literal backslash + character, but Python warns they will stop working in a future version.
Test plan
./run.shand confirm noSyntaxWarninglines appear for the affected files