Fixed #15943 -- Documented raw argument of pre_save and post_save s…

…ignals. Thanks, amplivibe.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16432 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/signals.txt

@@ -114,6 +114,12 @@ Arguments sent with this signal:
 ``instance``
     The actual instance being saved.
 
+``raw``
+    A boolean; ``True`` if the model is saved exactly as presented
+    (i.e. when loading a fixture). One should not query/modify other
+    records in the database as the database might not be in a
+    consistent state yet.
+
 .. versionadded:: 1.3
 
 ``using``
@@ -139,6 +145,12 @@ Arguments sent with this signal:
 ``created``
     A boolean; ``True`` if a new record was created.
 
+``raw``
+    A boolean; ``True`` if the model is saved exactly as presented
+    (i.e. when loading a fixture). One should not query/modify other
+    records in the database as the database might not be in a
+    consistent state yet.
+
 .. versionadded:: 1.3
 
 ``using``