There is a pattern in the Unix CLI world where frequently-used options are given a single-letter shorthand, and these can usually be combined together, or stacked. A very common example of this can be found with the rm command, which can remove directories recursively. These three commands are equivalent:
rm --recursive --force .
rm -r -f .
rm -rf .
Git has many sub-commands, each with many options. I've become used to Git allowing its shorthand options to be stacked for ease of use, like many other well-written CLI tools. For example:
git commit -am 'Create new commit message'
I've found that git stash is at least one exception, where the shorthands for the useful options --keep-index and --include-untracked cannot be stacked into -ku:
git stash -k -u # This works
git stash -ku # This doesn't
Is there a specific reason for this, other than that it hasn't been implemented? Are there other examples where Git options can't be stacked, and do these examples have specific reasons?