patch 9.0.1242: code for :runtime completion is not consistent

Problem:    Code for :runtime completion is not consistent.
Solution:   Make code for cmdline expansion more consistent. (closes #11875)
diff --git a/src/cmdexpand.c b/src/cmdexpand.c
index 8ca5ecd..2366157 100644
--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -1363,11 +1363,11 @@
 	// For a tag pattern starting with "/" no translation is needed.
 	if (context == EXPAND_HELP
 		|| context == EXPAND_COLORS
-		|| context == EXPAND_RUNTIME
 		|| context == EXPAND_COMPILER
 		|| context == EXPAND_OWNSYNTAX
 		|| context == EXPAND_FILETYPE
 		|| context == EXPAND_PACKADD
+		|| context == EXPAND_RUNTIME
 		|| ((context == EXPAND_TAGS_LISTFILES
 			|| context == EXPAND_TAGS)
 		    && fname[0] == '/'))
@@ -2314,10 +2314,6 @@
 	    xp->xp_pattern = arg;
 	    break;
 
-	case CMD_runtime:
-	    set_context_in_runtime_cmd(xp, arg);
-	    break;
-
 	case CMD_compiler:
 	    xp->xp_context = EXPAND_COMPILER;
 	    xp->xp_pattern = arg;
@@ -2338,6 +2334,10 @@
 	    xp->xp_pattern = arg;
 	    break;
 
+	case CMD_runtime:
+	    set_context_in_runtime_cmd(xp, arg);
+	    break;
+
 #if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
 	case CMD_language:
 	    return set_context_in_lang_cmd(xp, arg);