We removed prefilling the skipHook prefix in b102646b207 with the intention of
making it clearer that using the prefix in normal commits and typing `w` to skip
hooks are now two independent features.
It turns out that some people liked it with prefilling the prefix and perceive
it as a regression, so put it back in.
But only if we don't have a preserved message; this is an important use case,
when you try to make a normal commit, the hook fails, and then you want to make
the same commit with skipping the hook, but with the same message that you
already typed.
Add verify flag
Add and update integration tests
Rename verify to forceSkipHooks
Adapt CommitSkipHooks integration test to actually use a hook
Remove forceSkipHooks param from OnConfirm et al
Simplify tests
By constructing an arg vector manually, we no longer need to quote arguments
Mandate that args must be passed when building a command
Now you need to provide an args array when building a command.
There are a handful of places where we need to deal with a string,
such as with user-defined custom commands, and for those we now require
that at the callsite they use str.ToArgv to do that. I don't want
to provide a method out of the box for it because I want to discourage its
use.
For some reason we were invoking a command through a shell when amending a
commit, and I don't believe we needed to do that as there was nothing user-
supplied about the command. So I've switched to using a regular command out-
side the shell there
