Fix handling of leading spaces in scripts.

* grub-core/normal/cmdline.c (grub_cmdline_get): Don't strip leading
	spaces.
	* grub-core/normal/main.c (grub_file_getline): Remove all preprocessing
	other than skipping \r. All users updated.
	* tests/grub_script_echo1.in: Add space-related tests.
	* util/grub-menulst2cfg.c (main): Remove useless space skipping.

util/grub-menulst2cfg.c

@@ -80,12 +80,9 @@ main (int argc, char **argv)
       {
 	char *oldname = NULL;
 	char *newsuffix;
-	char *ptr;
-
-	for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++);
 
 	oldname = entryname;
-	parsed = grub_legacy_parse (ptr, &entryname, &newsuffix);
+	parsed = grub_legacy_parse (buf, &entryname, &newsuffix);
 	if (newsuffix)
 	  {
 	    suffixlen += strlen (newsuffix);