Change if refactored to match

src/scala/com/twitter/simclusters_v2/scalding/KnownForSources.scala

@@ -102,8 +102,9 @@ object KnownForSources {
     TypedPipe
       .from(TextLine(textFile))
       .flatMap { str =>
-        if (str.startsWith("#")) {none}
-        try {
+        str match {
+          case s"#$_" => none
+          case _ => try {
             val tokens = str.trim.split("\\s+")
             val userId = tokens(0).toLong
             (1 until tokens.length).foldRight(Array.newBuilder[(Int, Float)])((i, r) => {
@@ -127,6 +128,7 @@ object KnownForSources {
           }
         }
       }
+  }
 
   def stringifyKnownFor(
     input: TypedPipe[(Long, Array[(Int, Float)])]