Also reformat main servlet code.

Background: see https://gerrit-review.googlesource.com/c/77101/.

Change-Id: I1a66e301334a2fb9986ac35a5adf0b05e0c0079d

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

diff --git a/gitiles-servlet/src/main/java/com/google/gitiles/PathUtil.java b/gitiles-servlet/src/main/java/com/google/gitiles/PathUtil.java
index e55b77d..e67223f 100644
--- a/gitiles-servlet/src/main/java/com/google/gitiles/PathUtil.java
+++ b/gitiles-servlet/src/main/java/com/google/gitiles/PathUtil.java
@@ -59,6 +59,5 @@
     return path.substring(slash + 1);
   }
 
-  private PathUtil() {
-  }
+  private PathUtil() {}
 }