Fix some closure compilation issues 8n order to update compiler.jar

third_party/closure_compiler/checker.py

Index: third_party/closure_compiler/checker.py
diff --git a/third_party/closure_compiler/checker.py b/third_party/closure_compiler/checker.py
index a11e64daf95713001cd595b58734eaa519b3c618..4f9cbd5c9bcb2ea0a6a03f25894f0da574221cdc 100755
--- a/third_party/closure_compiler/checker.py
+++ b/third_party/closure_compiler/checker.py
@@ -138,7 +138,7 @@ class Checker(object):
         error: A Closure compiler error (2 line string with error and source).
 
     Return:
-        The fixed up erorr string (blank if it should be ignored).
+        The fixed up error string (blank if it should be ignored).
     """
     if " first declared in " in error:
       # Ignore "Variable x first declared in /same/file".
@@ -221,7 +221,8 @@ class Checker(object):
 
     output = self._format_errors(map(self._fix_up_error, errors))
     if errors:
-      self._error("Error in: %s%s" % (source_file, "\n" + output if output else ""))
+      prefix = "\n" if output else ""
+      self._error("Error in: %s%s%s" % (source_file, prefix, output))
     elif output:
       self._debug("Output: %s" % output)