Merge branch 'pw/rebase-fixup-fixes' into jch

Two bugs in how 'git rebase' handles skipped 'fixup' and 'squash' commands have been fixed. One bug caused an incorrect commit count to be shown in the template message when multiple commands were skipped, and another prevented the editor from opening when the final command in a chain containing 'fixup -c' was skipped. * pw/rebase-fixup-fixes: rebase: remember fixup -c after skipping fixup/squash rebase -i: fix counting of fixups after rebase --skip