[Bug] Doesn't work if author name has space

[arzzen]

[Bug] Doesn't work if author name has space

[beenotung]

I tried to use " and ' to escape, even using using echo-then-source, but the literal is wrapped by single quote if the content contains space. Below shows the log when running bash -x git-quick-stats:

+ _author='--author='\''Beeno Tung'\'''
++ date +%F
+ NEXT=2017-11-23
+ sort -u -r
+ git log --use-mailmap --no-merges --format=%cd --date=short '--author='\''Beeno' 'Tung'\'''
+ read DATE
+ head -n 10
fatal: ambiguous argument 'Tung'': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'