Demo-repo for reproducing Lucas-C/pre-commit-hooks#74

To reproduce the issue, do the following:

• check out the repo
• install pre-commit:

  pip3 install pre-commit
  pre-commit install --install-hooks --overwrite --hook-type commit-msg

• try to ammend a commit

  git commit --amend
  # close the editor for the commit message without changes to the file

• error output:

  No-tabs checker..........................................................Failed
  - hook id: forbid-tabs
  - exit code: 1
  
  Tabs detected in file: .git/COMMIT_EDITMSG