chore: remove consideration of line break characters to reduce whitespace false positives

[art1f1c3R]

Summary

This PR includes a small fix to the whitespace rule due to observed false positives on multiline statements by removing consideration of line break characters.

Description of changes

Multiline statements such as :

<some code>;

<some code>

were being triggered by the whitespace obfuscation rule. This is because \s includes \f, \v, \r, and \n, all of which are line break characters. The regex would then match line breaks after the ;, and the subsequent code line. To avoid this, the whitespace now only includes the space character and \t.

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