Merge branch 'bm/interpret-trailers-cut-line-is-eom' into maint

"git interpret-trailers", when used as GIT_EDITOR for "git commit -v", looked for and appended to a trailer block at the very end, i.e. at the end of the "diff" output. The command has been corrected to pay attention to the cut-mark line "commit -v" adds to the buffer---the real trailer block should appear just before it. * bm/interpret-trailers-cut-line-is-eom: interpret-trailers: honor the cut line