Minor pluralization tweak.

studdugie · studdugie · commit d11d86e47818 · 2015-01-06T15:43:07.000-05:00
diff --git a/en/00-Foreword01.tut b/en/00-Foreword01.tut
@@ -57,7 +57,7 @@ Do not reproduce these articles without explicit permissions from us. Copyright
 reserved.
 
 I encourage readers to send feedback (C<agentzh@gmail.com>), especially
-constructive criticisms.
+constructive criticism.
 
 The source for all the articles is on GitHub and is under version control:
 
