Minor fix in CommentLinkInfo example

Change-Id: If63ee64c523924eeadeddb668c921ab202bb8f64

gitiles-servlet/src/main/java/com/google/gitiles/CommentLinkInfo.java

diff --git a/gitiles-servlet/src/main/java/com/google/gitiles/CommentLinkInfo.java b/gitiles-servlet/src/main/java/com/google/gitiles/CommentLinkInfo.java
index 536d149..cf10241 100644
--- a/gitiles-servlet/src/main/java/com/google/gitiles/CommentLinkInfo.java
+++ b/gitiles-servlet/src/main/java/com/google/gitiles/CommentLinkInfo.java
@@ -32,7 +32,7 @@
  * Example:
  * <pre>
  *  new CommentLinkInfo(
- *      Pattern.compile("bug \d+"),
+ *      Pattern.compile("bug (\d+)"),
  *      "http://bugs/$1")
  *    .linkify("do something nice\n\nbug 5")
  * </pre>