diff --git a/java/com/google/gitiles/doc/Navbar.java b/java/com/google/gitiles/doc/Navbar.java
index 4914297..c05f9d9 100644
--- a/java/com/google/gitiles/doc/Navbar.java
+++ b/java/com/google/gitiles/doc/Navbar.java
@@ -128,11 +128,8 @@
   }
 
   private static Set<String> splitExtensionNames(String url) {
-    return Splitter.on(CharMatcher.whitespace().or(CharMatcher.is(',')))
-        .trimResults()
-        .omitEmptyStrings()
-        .splitToList(url)
-        .stream()
+    return Splitter.on(CharMatcher.whitespace().or(CharMatcher.is(','))).trimResults()
+        .omitEmptyStrings().splitToList(url).stream()
         .map(String::toLowerCase)
         .collect(toSet());
   }