Change regex string to raw string to avoid improper escape #177
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The regex string `'\W+'` causes a `SyntaxWarning` in Python 3.12 and later, since this is an invalid escape sequence. It will eventually become a `SyntaxError` in later versions. Changing this to a raw string will prevent it from being misinterpreted as an escape sequence.
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The regex string
'\W+'causes aSyntaxWarningin Python 3.12 and later, since this is an invalid escape sequence. It will eventually become aSyntaxErrorin later versions. Changing this to a raw string will prevent it from being misinterpreted as an escape sequence.Fixes #139