Ignore whitespace when attempting to recommend an alias

[codyduong]

Sometimes if you are using something like

gst   #<-- empty whitespace

it will suggest

gst

despite these being basically the same.

[codyduong]

This is relatively trivial with a $String.trim(), and in fact the patch is already done, but consider the case like so

g stash    --keep-untracked

where the whitespace is in the middle. Maybe just replace all whitespace greater than 1 with simply 1 whitespace?