[PATCH v2 0/5] %(trailers) improvements in pretty format

This adds support for three new options to %(trailers):
 * key -- show only trailers with specified key
 * nokey -- don't show key part of trailers
 * separator -- allow specifying custom separator between trailers

Anders Waldenborg (5):
  pretty: single return path in %(trailers) handling
  pretty: allow showing specific trailers
  pretty: add support for "nokey" option in %(trailers)
  pretty: extract fundamental placeholders to separate function
  pretty: add support for separator option in %(trailers)

 Documentation/pretty-formats.txt | 17 +++++---
 pretty.c                         | 71 ++++++++++++++++++++++++++------
 t/t4205-log-pretty-formats.sh    | 60 +++++++++++++++++++++++++++
 trailer.c                        | 28 ++++++++++---
 trailer.h                        |  3 ++
 5 files changed, 156 insertions(+), 23 deletions(-)