Merge branch 'maint'

* maint:
  Start preparing release notes for 1.5.6.3
  git-submodule - Fix bugs in adding an existing repo as a module
  bash: offer only paths after '--'
  Remove unnecessary pack-*.keep file after successful git-clone
  make deleting a missing ref more quiet

diff --cc builtin-clone.c
Simple merge

diff --cc contrib/completion/git-completion.bash
index cc75ad7,cff28a8..27332ed
--- 1/contrib/completion/git-completion.bash
--- 2/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@@ -511,7 -525,9 +525,9 @@@ _git_add (
  
  _git_bisect ()
  {
 -      local subcommands="start bad good reset visualize replay log"
+       __git_has_doubledash && return
+ 
 +      local subcommands="start bad good skip reset visualize replay log run"
        local subcommand="$(__git_find_subcommand "$subcommands")"
        if [ -z "$subcommand" ]; then
                __gitcomp "$subcommands"

diff --cc refs.c
Simple merge