Disallow Pod blocks inside of Formatting Codes.

S26-documentation.pod

@@ -1696,15 +1696,13 @@ B<3.E<nbsp;nbsp>I<Synopsis>>
 Formatting codes provide a way to add inline mark-up to a piece of text
 within the contents of (most types of) Pod block (including all
 L<declarator blocks|#Declarator blocks>). Formatting codes are
-themselves a type of block, and most of them may nest sequences of any
+themselves a type of block, and may nest other formatting codes.
 other type of block (most often, other formatting codes). In particular,
 you can nest comment blocks in the middle of a formatting code:
 
 =begin code :allow<B V>
     V<B><I shall say this loudly
-    B<=begin comment
-    and repeatedly
-    =end comment>
+    B<Z<and repeatedly>>
     and with emphasis.>
 =end code