content: capitalise the script in JavaScript

Fixes golang/tour#27

Change-Id: Idcaf9b2ad7f08ea20b7bd1f7f1ff600cb43e2d55
Reviewed-on: https://go-review.googlesource.com/51070
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/content/flowcontrol.article b/content/flowcontrol.article
index 9720b34..28453a5 100644
--- a/content/flowcontrol.article
+++ b/content/flowcontrol.article
@@ -20,7 +20,7 @@
 
 The loop will stop iterating once the boolean condition evaluates to `false`.
 
-_Note_: Unlike other languages like C, Java, or Javascript there are no parentheses
+_Note_: Unlike other languages like C, Java, or JavaScript there are no parentheses
 surrounding the three components of the `for` statement and the braces `{`}` are
 always required.
 
@@ -28,7 +28,7 @@
 
 * For continued
 
-The init and post statement are optional. 
+The init and post statement are optional.
 
 .play flowcontrol/for-continued.go