Minor sentence flow improvements in update() docs

Author: paultcochrane

lib/Type/Blob.pod

@@ -57,9 +57,9 @@ letter, and are optionally followed by a quantifier. The quantifier can be
 C<*> (which typically stands for "use up the rest of the Blob here"), or a
 positive integer (without a C<+>).
 
-Whitespace between template units are ignored.
+Whitespace between template units is ignored.
 
-So valid templates are for example C<"A4 C n*"> or C<"A*">.
+Examples of valid templates include C<"A4 C n*"> and C<"A*">.
 
 The following letters are recognized: