tweak grammar and spelling

Author: tbrowder

doc/Language/pod.pod6

@@ -158,7 +158,7 @@ where N is greater than zero (e.g., C<=head1>, C<=head2>, …).
 
 =head2 Ordinary paragraphs
 
-Ordinary paragraph consist of text that is to be formatted into a document at the current level of nesting,
+An ordinary paragraph consists of text that is to be formatted into a document at the current level of nesting,
 with whitespace squeezed, lines filled, and any special inline mark-up applied.
 
 Ordinary paragraphs consist of one or more consecutive lines of text,