This commit changes the way aliases are rendered, adding the "no more
flags" flag `--`, which means that, for example, the alias `"-" = "cd
-";` will work as expected. (I was getting a syntax error before this
change.)
Additionally, now the alias key is shell escaped, which may help some
edge cases. I'm honestly not sure if this part is necessary since I
assume an alias can't contain spaces anyway, but it definitely
shouldn't break anything.