Merge branch 'master' (early part) into pd/bash-4-completion

* 'master' (early part): (529 commits)
  completion: fix zsh check under bash with 'set -u'
  Fix copy-pasted comments related to tree diff handling.
  Git 1.7.3.2
  {cvs,svn}import: use the new 'git read-tree --empty'
  t/t9001-send-email.sh: fix stderr redirection in 'Invalid In-Reply-To'
  Clarify and extend the "git diff" format documentation
  git-show-ref.txt: clarify the pattern matching
  documentation: git-config minor cleanups
  Update test script annotate-tests.sh to handle missing/extra authors
  Better advice on using topic branches for kernel development
  Documentation: update implicit "--no-index" behavior in "git diff"
  Documentation: expand 'git diff' SEE ALSO section
  Documentation: diff can compare blobs
  Documentation: gitrevisions is in section 7
  fast-import: Allow filemodify to set the root
  shell portability: no "export VAR=VAL"
  CodingGuidelines: reword parameter expansion section
  Documentation: update-index: -z applies also to --index-info
  gitweb: Improve behavior for actionless path_info gitweb URLs
  gitweb: Fix bug in evaluate_path_info
  ...

Conflicts:
	GIT-VERSION-GEN
	RelNotes
	contrib/completion/git-completion.bash

diff --cc Documentation/config.txt
Simple merge

diff --cc contrib/completion/git-completion.bash
index 1747091287a1cabacbcd16ea7274b7ba295d4932,168669bbf79cb33c527a688fb906e276beadaf79..d117055f56ea2200ebe6d23a558c7b654b1035cf
--- 1/contrib/completion/git-completion.bash
--- 2/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@@ -321,135 -327,6 +327,162 @@@ __gitcomp_1 (
        done
  }
  
 +# The following function is based on code from:
 +#
 +#   bash_completion - programmable completion functions for bash 3.2+
 +#
 +#   Copyright © 2006-2008, Ian Macdonald <ian@caliban.org>
 +#             © 2009-2010, Bash Completion Maintainers
 +#                     <bash-completion-devel@lists.alioth.debian.org>
 +#
 +#   This program is free software; you can redistribute it and/or modify
 +#   it under the terms of the GNU General Public License as published by
 +#   the Free Software Foundation; either version 2, or (at your option)
 +#   any later version.
 +#
 +#   This program is distributed in the hope that it will be useful,
 +#   but WITHOUT ANY WARRANTY; without even the implied warranty of
 +#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 +#   GNU General Public License for more details.
 +#
 +#   You should have received a copy of the GNU General Public License
 +#   along with this program; if not, write to the Free Software Foundation,
 +#   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 +#
 +#   The latest version of this software can be obtained here:
 +#
 +#   http://bash-completion.alioth.debian.org/
 +#
 +#   RELEASE: 2.x
 +
 +# This function can be used to access a tokenized list of words
 +# on the command line:
 +#
 +#     __git_reassemble_comp_words_by_ref '=:'
 +#     if test "${words_[cword_-1]}" = -w
 +#     then
 +#             ...
 +#     fi
 +#
 +# The argument should be a collection of characters from the list of
 +# word completion separators (COMP_WORDBREAKS) to treat as ordinary
 +# characters.
 +#
 +# This is roughly equivalent to going back in time and setting
 +# COMP_WORDBREAKS to exclude those characters.  The intent is to
 +# make option types like --date=<type> and <rev>:<path> easy to
 +# recognize by treating each shell word as a single token.
 +#
 +# It is best not to set COMP_WORDBREAKS directly because the value is
 +# shared with other completion scripts.  By the time the completion
 +# function gets called, COMP_WORDS has already been populated so local
 +# changes to COMP_WORDBREAKS have no effect.
 +#
 +# Output: words_, cword_, cur_.
 +
 +__git_reassemble_comp_words_by_ref()
 +{
 +      local exclude i j first
 +      # Which word separators to exclude?
 +      exclude="${1//[^$COMP_WORDBREAKS]}"
 +      cword_=$COMP_CWORD
 +      if [ -z "$exclude" ]; then
 +              words_=("${COMP_WORDS[@]}")
 +              return
 +      fi
 +      # List of word completion separators has shrunk;
 +      # re-assemble words to complete.
 +      for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
 +              # Append each nonempty word consisting of just
 +              # word separator characters to the current word.
 +              first=t
 +              while
 +                      [ $i -gt 0 ] &&
 +                      [ -n "${COMP_WORDS[$i]}" ] &&
 +                      # word consists of excluded word separators
 +                      [ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
 +              do
 +                      # Attach to the previous token,
 +                      # unless the previous token is the command name.
 +                      if [ $j -ge 2 ] && [ -n "$first" ]; then
 +                              ((j--))
 +                      fi
 +                      first=
 +                      words_[$j]=${words_[j]}${COMP_WORDS[i]}
 +                      if [ $i = $COMP_CWORD ]; then
 +                              cword_=$j
 +                      fi
 +                      if (($i < ${#COMP_WORDS[@]} - 1)); then
 +                              ((i++))
 +                      else
 +                              # Done.
 +                              return
 +                      fi
 +              done
 +              words_[$j]=${words_[j]}${COMP_WORDS[i]}
 +              if [ $i = $COMP_CWORD ]; then
 +                      cword_=$j
 +              fi
 +      done
 +}
 +
 +if ! type _get_comp_words_by_ref >/dev/null 2>&1; then
++if [[ -z ${ZSH_VERSION:+set} ]]; then
 +_get_comp_words_by_ref ()
 +{
 +      local exclude cur_ words_ cword_
 +      if [ "$1" = "-n" ]; then
 +              exclude=$2
 +              shift 2
 +      fi
 +      __git_reassemble_comp_words_by_ref "$exclude"
 +      cur_=${words_[cword_]}
 +      while [ $# -gt 0 ]; do
 +              case "$1" in
 +              cur)
 +                      cur=$cur_
 +                      ;;
 +              prev)
 +                      prev=${words_[$cword_-1]}
 +                      ;;
 +              words)
 +                      words=("${words_[@]}")
 +                      ;;
 +              cword)
 +                      cword=$cword_
 +                      ;;
 +              esac
 +              shift
 +      done
 +}
++else
++_get_comp_words_by_ref ()
++{
++      while [ $# -gt 0 ]; do
++              case "$1" in
++              cur)
++                      cur=${COMP_WORDS[COMP_CWORD]}
++                      ;;
++              prev)
++                      prev=${COMP_WORDS[COMP_CWORD-1]}
++                      ;;
++              words)
++                      words=("${COMP_WORDS[@]}")
++                      ;;
++              cword)
++                      cword=$COMP_CWORD
++                      ;;
++              -n)
++                      # assume COMP_WORDBREAKS is already set sanely
++                      shift
++                      ;;
++              esac
++              shift
++      done
++}
++fi
 +fi
 +
  # __gitcomp accepts 1, 2, 3, or 4 arguments
  # generates completion reply with compgen
  __gitcomp ()
@@@ -2522,10 -2345,13 +2555,15 @@@ _git (
  {
        local i c=1 command __git_dir
  
 -      while [ $c -lt $COMP_CWORD ]; do
 -              i="${COMP_WORDS[c]}"
+       if [[ -n ${ZSH_VERSION-} ]]; then
+               emulate -L bash
+               setopt KSH_TYPESET
+       fi
+ 
 +      local cur words cword
 +      _get_comp_words_by_ref -n =: cur words cword
 +      while [ $c -lt $cword ]; do
 +              i="${words[c]}"
                case "$i" in
                --git-dir=*) __git_dir="${i#--git-dir=}" ;;
                --bare)      __git_dir="." ;;
@@@ -2568,9 -2394,14 +2606,14 @@@
  
  _gitk ()
  {
+       if [[ -n ${ZSH_VERSION-} ]]; then
+               emulate -L bash
+               setopt KSH_TYPESET
+       fi
+ 
        __git_has_doubledash && return
  
 -      local cur="${COMP_WORDS[COMP_CWORD]}"
 +      local cur
        local g="$(__gitdir)"
        local merge=""
        if [ -f "$g/MERGE_HEAD" ]; then