bpo-45379: clarify FROZEN_EXCLUDED documentation

FFY00 · FFY00 · commit e7a5fad70b0b · 2021-10-23T13:33:32.000+01:00
Signed-off-by: Filipe Laíns &lt;lains@riseup.net&gt;
diff --git a/Python/import.c b/Python/import.c
@@ -1142,7 +1142,8 @@ typedef enum {
     FROZEN_BAD_NAME,    // The given module name wasn't valid.
     FROZEN_NOT_FOUND,   // It wasn't in PyImport_FrozenModules.
     FROZEN_DISABLED,    // -X frozen_modules=off (and not essential)
-    FROZEN_EXCLUDED,    // The PyImport_FrozenModules entry has NULL "code".
+    FROZEN_EXCLUDED,    /* The PyImport_FrozenModules entry has NULL "code"
+                           (module is present but marked as unimportable, stops search). */
     FROZEN_INVALID,     // The PyImport_FrozenModules entry is bogus.
 } frozen_status;
 
