bug#14015: Feature request: highlight partial matches in Info's index-search

[Eli Zaretskii]

When 'i foo RET' yields a partial match, e.g., finding "foobar" in the
index, the stand-alone Info reader "highlights" the part that matched,
like this:

   Found FOObar in Some Node. (`,' tries to find next.)

(The stand-alone reader is a text-mode program, so it changes the
letter-case to emphasize the part that matched.)

It would be nice if Emacs did something similar, although it is
probably better to use colors if available.  (We could also use bold
or italic, but at least bold might cause annoying movement of the mode
line, to allow for slightly larger font.)