The regex was written to validate email addresses. Three months later, nobody on the team can read it without a regex tester open in another tab and a quiet prayer. The original author is not on the team anymore. The documentation says validates email format. What it actually does is slightly more complicated and slightly less reliable in ways that have only surfaced twice in production. This shirt is for developers who've inherited a regular expression they're afraid to touch, who've opened regex101.com with the specific intention of understanding what a colleague wrote, and who've written a regex so elegant that six months later they couldn't explain it either. Regex explains itself perfectly. The explanation is another regex. You were hired to understand these things. The match group being optional is your problem now.
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Product: Premium Unisex T-Shirt
REGEX Explains Itself - t-shirt
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