Issue #28139: Fix messed up indentation

Also update the classmethod and staticmethod doc strings and comments to
match the RST documentation.
diff --git a/Modules/_localemodule.c b/Modules/_localemodule.c
index b1d6add..b1307ef 100644
--- a/Modules/_localemodule.c
+++ b/Modules/_localemodule.c
@@ -54,9 +54,10 @@
     int i;
     PyObject *result, *val = NULL;
 
-    if (s[0] == '\0')
+    if (s[0] == '\0') {
         /* empty string: no grouping at all */
         return PyList_New(0);
+    }
 
     for (i = 0; s[i] != '\0' && s[i] != CHAR_MAX; i++)
         ; /* nothing */