Feature request: #a (approximate matching) only for spaces

[Sebastian Gniazdowski <sgniazdowski@xxxxxxxxx>]

Hello,
currently #a{num} works on any character. It would be useful to have
it work only on spaces. For example, if someone greps history with
"gitpush", it would match "git push". Current #a does this match like
described, however it also adds "noise" by doing matches with all
other errors handled by #a, for all characters.

Also, I wonder if there can something be done to handle searches as follows:

gitpurge
#=> git remote purge origin

Best regards,
Sebastian Gniazdowski