Make completion for debugindex<tab><tab> show debugindexdot, too.
The special handling for commands with names that are substrings of other
commands (e.g. with st and strip) wasn't used with debug commands before.
syntax: glob
*.elc
*.orig
*.rej
*~
*.so
*.pyc
*.swp
*.prof
tests/*.err
build
dist
doc/*.[0-9]
doc/*.[0-9].gendoc.txt
doc/*.[0-9].{x,ht}ml
MANIFEST
patches
mercurial/__version__.py
syntax: regexp
^\.pc/