I noticed in the documentation that you added indexterms for the
functions, but that they (along with the existing ones) are in the SIMILAR
TO regular expression section. These functions do not take SIMILAR TO
regular expressions, but POSIX regular expressions, so I moved them to
that section in this patch, and also moved the regexp_replace indexterm
there also, since it also uses POSIX regular expressions.
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10.0 times 0.1 is hardly ever 1.0.