Merge pull request #1128 from erikr/improve-smallint-docs

Fixed #20446 -- Documentation for SmallIntegerField does not clarify 'small'

docs/ref/models/fields.txt

@@ -889,7 +889,8 @@ The value ``0`` is accepted for backward compatibility reasons.
 .. class:: PositiveSmallIntegerField([**options])
 
 Like a :class:`PositiveIntegerField`, but only allows values under a certain
-(database-dependent) point.
+(database-dependent) point. Values up to 32767 are safe in all databases
+supported by Django.
 
 ``SlugField``
 -------------
@@ -917,7 +918,8 @@ of some other value.  You can do this automatically in the admin using
 .. class:: SmallIntegerField([**options])
 
 Like an :class:`IntegerField`, but only allows values under a certain
-(database-dependent) point.
+(database-dependent) point. Values from -32768 to 32767 are safe in all databases
+supported by Django.
 
 ``TextField``
 -------------