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Added link to POSIX standard.
@@ -25,3 +25,8 @@ In POSIX shell, the shell cares about nothing but another single-quote to termin
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### Exceptions
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If you want your single-quoted string to end in a backslash, you can rewrite as `'string'\\` or [[ignore]] this warning.
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### Related resources:
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See POSIX.1-2024, section "C.2.2.2 Single-Quotes:"
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https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xcu_chap01.html#tag_23_02
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