Merge pull request #249 from sandstroms/patch-1

Updated introduction
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Zeeshan Ahmad 2022-01-20 17:33:27 +04:00 committed by GitHub
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A regular expression is a pattern that is matched against a subject string from
left to right. Regular expressions are used to replace text within a string,
validating forms, extracting a substring from a string based on a pattern match,
validate forms, extract a substring from a string based on a pattern match,
and so much more. The term "regular expression" is a mouthful, so you will usually
find the term abbreviated to "regex" or "regexp".