info: interactive search and regex patterns

[Ralf Wildenhues]

Hello Karl, bug-texinfo readers,

I just noted a weird difference between texinfo 4.8's info and current
CVS:  when I use I-search (CTRL-s) to search for, say, `a.', or `a*',
it does not match literally anymore, but interprets the strings as a
regular expression.  While that seems to be intended, according to a
NEWS entry, it is not possible to use, say, backslash or brackets to
escape regex-active characters: `a\.', or `a[.]'.

I should note that the R switch to toggle the interactive searching mode
seems to work as intended.

Moreover, may I suggest that the prompt be changed from `I-search: '
to, say `Regex-I-search: ' or similar, when the regex-mode is active,
so that the difference is immediately apparent?  That would have given
me enough clue to not suspect a bug, and to look right away for a switch
to turn this behavior off.

Thanks,
Ralf