Merge branch 'jr/bisect-custom-terms-in-output' into jch

"git bisect" now uses the selected terms (e.g., old/new) more
consistently in its output.

* jr/bisect-custom-terms-in-output:
  rev-parse: use selected alternate terms to look up refs
  bisect: print bisect terms in single quotes
  bisect: use selected alternate terms in status output

diff --cc builtin/rev-parse.c
Simple merge

diff --cc t/t6030-bisect-porcelain.sh
Simple merge