Merge branch 'rs/optim-text-wrap'

* rs/optim-text-wrap:
  utf8.c: speculatively assume utf-8 in strbuf_add_wrapped_text()
  utf8.c: remove strbuf_write()
  utf8.c: remove print_spaces()
  utf8.c: remove print_wrapped_text()

diff --cc builtin-shortlog.c
Simple merge

diff --cc utf8.c
Simple merge

diff --cc utf8.h
Simple merge