[PATCH 0/4] utf8.c: strbuf'ify strbuf_add_wrapped_text()

The strbuf parameter of strbuf_add_wrapped_text() in utf8.c is optional; if it's missing, results are directly written to stdout. By removing this flexibility and converting it to only call "pure" strbuf functions, this series cleans up the code a bit and enables an optimization, which is added in the last patch:

  [PATCH 1/4] utf8.c: remove print_wrapped_text()
  [PATCH 2/4] utf8.c: remove print_spaces()
  [PATCH 3/4] utf8.c: remove strbuf_write()

  [PATCH 4/4] utf8.c: speculatively assume utf-8 in strbuf_add_wrapped_text()

 builtin-shortlog.c |   17 ++++++++++++--
 utf8.c             |   61 +++++++++++++++++++++++----------------------------
 utf8.h             |    1 -
 3 files changed, 42 insertions(+), 37 deletions(-)