bash_completion: don't complete export with "garbage" when mq is not around
The "garbage" is the output of hg help printed when a command is not found.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
merge: warning: conflicts during merge
merging a
merging a failed!
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
There are unresolved merges, you can redo the full merge using:
hg update -C 2
hg merge 1
e7fe8eb3e180+0d24b7662d3e+ tip
something else
=======
something
M a