i18n: fix mistakes in translated strings

Fix typos and convert a question which does not expect to be replied
to a simple advice.

Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/submodule--helper.c

@@ -542,7 +542,7 @@ static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
 		argv_array_pushv(&cpr.args, info->argv);
 		if (run_command(&cpr))
-			die(_("run_command returned non-zero status while"
+			die(_("run_command returned non-zero status while "
 				"recursing in the nested submodules of %s\n."),
 				displaypath);
 	}

config.c

@@ -124,7 +124,7 @@ static const char include_depth_advice[] = N_(
 "	%s\n"
 "from\n"
 "	%s\n"
-"Do you have circular includes?");
+"This might be due to circular includes.");
 static int handle_path_include(const char *path, struct config_include_data *inc)
 {
 	int ret = 0;

sequencer.c

@@ -720,7 +720,7 @@ static const char *read_author_ident(struct strbuf *buf)
 	/* dequote values and construct ident line in-place */
 	for (in = buf->buf; i < 3 && in - buf->buf < buf->len; i++) {
 		if (!skip_prefix(in, keys[i], (const char **)&in)) {
-			warning(_("could not parse '%s' (looking for '%s'"),
+			warning(_("could not parse '%s' (looking for '%s')"),
 				rebase_path_author_script(), keys[i]);
 			return NULL;
 		}