tab-completion should adjust case of suggestion if a respective file exists

[Martin Castillo]

Hi,

weird subject. Just consider this:
# assume: set completion-ignore-case on
$ mkdir new && cd new;
$ mkdir Foo foobar
$ ls f<TAB>
$ ls foo


foo does not exist, but Foo is (the only) matching foo not considering 
case. I suggest readline to suggest Foo instead of foo.

Martin Castillo