bug#45516: 26.3; (elisp) `Modifying Strings': Mention `replace-regexp-in-string'

[Lars Ingebrigtsen]

Drew Adams <drew.adams@oracle.com> writes:

> Subject line says it all.  This is an important function for modifying
> strings.  Please consider mentioning it, with a cross-reference.

That node is about destructively modifying strings.
replace-regexp-in-string doesn't modify anything -- it returns a new
string.

But it's odd that there's no mention of replace-regexp-in-string (and
string-replace) in the Strings section, so I've now added a reference
from the Creating Strings node.

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