Add the -v flag to commit --amend.

This allows us to always see things we are going to commit, even if we
are amending.

gitconfig

@@ -8,7 +8,7 @@
   aa = add --all
   ap = add --patch
   branches = for-each-ref --sort=-committerdate --format=\"%(color:blue)%(authordate:relative)\t%(color:red)%(authorname)\t%(color:white)%(color:bold)%(refname:short)\" refs/remotes
-  ca = commit --amend
+  ca = commit --amend -v
   ci = commit -v
   co = checkout
   co-pr = !sh -c 'git fetch origin pull/$1/head:pr/$1 && git checkout pr/$1' -