commit --amend bindings needs --allow-empty

[KSR-Yasuda]

Shouldn't it set --allow-empty option for commit --amend bindings such as ca,
while cW binding or commit --fixup=reword has been introduced?

Otherwise, amending such rewording commits by ca fails.

• cf. Support git commit --fixup=amend:<commit> and --fixup=reword:<commit> keymaps #2369

[tpope]

Otherwise, amending such rewording commits by ca fails.

The reason git requires --allow-empty is to make sure empty commits are deliberate. It's impossible to create an empty commit by accident. I'm not going to remove that protection to address one narrow edge case.

[KSR-Yasuda]

Okay, thank you.