sequencer: allow editing the commit message on a case-by-case basis

In the upcoming commits, we will implement more and more of rebase
-i's functionality. One particular feature of the commands to come is
that some of them allow editing the commit message while others don't,
i.e. we cannot define in the replay_opts whether the commit message
should be edited or not.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

sequencer.c

@@ -485,7 +485,7 @@ static char **read_author_script(void)
  * author metadata.
  */
 int sequencer_commit(const char *defmsg, struct replay_opts *opts,
-			  int allow_empty)
+			  int allow_empty, int edit)
 {
 	char **env = NULL;
 	struct argv_array array;
@@ -520,7 +520,7 @@ int sequencer_commit(const char *defmsg, struct replay_opts *opts,
 		argv_array_push(&array, "-s");
 	if (defmsg)
 		argv_array_pushl(&array, "-F", defmsg, NULL);
-	if (opts->edit)
+	if (edit)
 		argv_array_push(&array, "-e");
 	else if (!opts->signoff && !opts->record_origin &&
 		 git_config_get_value("commit.cleanup", &value))
@@ -786,7 +786,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 	}
 	if (!opts->no_commit)
 		res = sequencer_commit(opts->edit ? NULL : git_path_merge_msg(),
-			opts, allow);
+			opts, allow, opts->edit);
 
 leave:
 	free_message(commit, &msg);

sequencer.h

@@ -54,7 +54,7 @@ int sequencer_rollback(struct replay_opts *opts);
 int sequencer_remove_state(struct replay_opts *opts);
 
 int sequencer_commit(const char *defmsg, struct replay_opts *opts,
-			  int allow_empty);
+			  int allow_empty, int edit);
 
 extern const char sign_off_header[];