emacs completion inferior to bash's

[Dan Jacobson]

For find-file, or Info, two TABs needed to be sure of only match:

In the top info menu, we type mysTAB
   Menu item: mysql
As the cursor is left at the end of line instead of moving further to
the right like bash does on successful only match completions, _we must
hit tab again_ to find
  Menu item: mysql [Sole completion]

Same problem with find-file.
So we find all along emacs' completion is inferior to bash's.
You might say that is because moving to the right is OK in bash, but
not in emacs. OK, but you must admit that the user must hit TAB a
second time to make sure he is not at the bifurcation point of aaa1bbb
and aaa2bbb.

So maybe have some indication somewhere tell the user that he has
already got the only match -- without having him have to ask via TAB.