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Doc patch for Bug #11132 #900

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Doc patch for Bug #11132 #900

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3 changes: 3 additions & 0 deletions string.c
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Expand Up @@ -4310,6 +4310,9 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
* double-quoted string, both back-references must be preceded by an
* additional backslash. However, within +replacement+ the special match
* variables, such as <code>&$</code>, will not refer to the current match.
* If +replacement+ is a String that looks like a pattern's capture group but
* is actaully not a pattern capture group e.g. <code>"\\'"</code>, then it
* will have to be preceded by two backslashes like so <code>"\\\\'"</code>.
*
* If the second argument is a Hash, and the matched text is one of its keys,
* the corresponding value is the replacement string.
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