Bug Report - Git does not require a space between shorthand flags and the commit-message

[uxecw <uxecw@student.kit.edu>]

Thank you for filling out a Git bug report!
Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)
Rebasing.
I entered `git commit —amend` (one hypen istead of two) accidently and 
it passed as defacto `git commit —all —message "end"`.
I think because of the missing space git should have rejected the given 
input.

What did you expect to happen? (Expected behavior)
Input should have been rejected

What happened instead? (Actual behavior)
`git commit —all —message "end"`

What's different between what you expected and what actually happened?

Anything else you want to add:

Please review the rest of the bug report below.
You can delete any lines you don't wish to share.


[System Info]
git version:
git version 2.34.1
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
uname: Linux 5.19.0-46-generic #47~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC 
Wed Jun 21 15:35:31 UTC 2 x86_64
compiler info: gnuc: 11.3
libc info: glibc: 2.35
$SHELL (typically, interactive shell): /bin/bash


[Enabled Hooks]
not run from a git repository - no hooks to show