Support --strategy=x completion in addition to --strategy x.

Because git-merge and git-rebase both accept -s, --strategy or --strategy=
we should recognize all three formats in the bash completion functions and
issue back all merge strategies on demand.

I also moved the prior word testing to be before the current word testing,
as the current word cannot be completed with -- if the prior word was an
option which requires a parameter, such as -s or --strategy.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

contrib/completion/git-completion.bash

@@ -435,18 +435,23 @@ _git_log ()
 _git_merge ()
 {
 	local cur="${COMP_WORDS[COMP_CWORD]}"
+	case "${COMP_WORDS[COMP_CWORD-1]}" in
+	-s|--strategy)
+		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" -- "$cur"))
+		return
+	esac
 	case "$cur" in
+	--strategy=*)
+		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" \
+			-- "${cur##--strategy=}"))
+		return
+		;;
 	--*)
 		COMPREPLY=($(compgen -W "
 			--no-commit --no-summary --squash --strategy
 			" -- "$cur"))
 		return
 	esac
-	case "${COMP_WORDS[COMP_CWORD-1]}" in
-	-s|--strategy)
-		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" -- "$cur"))
-		return
-	esac
 	COMPREPLY=($(compgen -W "$(__git_refs)" -- "$cur"))
 }
 
@@ -523,18 +528,23 @@ _git_rebase ()
 			" -- "$cur"))
 		return
 	fi
+	case "${COMP_WORDS[COMP_CWORD-1]}" in
+	-s|--strategy)
+		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" -- "$cur"))
+		return
+	esac
 	case "$cur" in
+	--strategy=*)
+		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" \
+			-- "${cur##--strategy=}"))
+		return
+		;;
 	--*)
 		COMPREPLY=($(compgen -W "
 			--onto --merge --strategy
 			" -- "$cur"))
 		return
 	esac
-	case "${COMP_WORDS[COMP_CWORD-1]}" in
-	-s|--strategy)
-		COMPREPLY=($(compgen -W "$(__git_merge_strategies)" -- "$cur"))
-		return
-	esac
 	COMPREPLY=($(compgen -W "$(__git_refs)" -- "$cur"))
 }