Replace gsub with rstrip#1095
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The regular expression ``/\s*\z/`` matches any whitespace characters at end of string, which means only one match is possible with ``gsub``, replacing it with an empty string. The same can be achieved by ``String#rstrip``.
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The regular expression
/\s*\z/matches any whitespace characters at end of string, which means only one match is possible withgsub, replacing it with an empty string. The same can be achieved byString#rstrip.