Info reader - issues finding first index entry

[Charles Reilly]

Hi,

Using info I have had some issues with finding the first entry in the 
index.  For example, try running "info gzip".  The first entry in the 
concept index for gzip is "bugs".  Some example searches:

    ibugs   - Succeeds
    ibu     - No entries containing 'bu'.
    Ibugs   - No entries containing 'bugs'.
    Ibu     - No entries containing 'bu'.

It seems that the index-search only finds the first entry if it is an 
exact match.  The virtual-index never finds the first entry.

Four similar tests for the second index entry, "concatenated files", all 
succeed.

I'm using info version 6.7.  A similar bug was reported previously:
https://lists.gnu.org/archive/html/bug-texinfo/2010-07/msg00015.html

Cheers,
Charles