Don't eat non-empty chunks.

dart/tools/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 
 import optparse
 import os
 import re
@@ skipping 275 matching lines @@
         print '%s%s\r' % (clr_eol, section),
       chunk = []
     if not section or has_interesting_info:
       print line
     else:
       length = len(chunk)
       if length == 2 and line != 'Check dependencies':
         has_interesting_info = True
       elif (length == 1 or length == 3) and line:
         has_interesting_info = True
+      elif length > 3:
+        has_interesting_info = True
       if has_interesting_info:
         print '\n'.join(chunk)
         chunk = []
       else:
         chunk.append(line)
   if not is_empty_chunk(chunk):
     print '\n'.join(chunk)
 
 
 def Main():
@@ skipping 100 matching lines @@
           process.wait()
           if process.returncode != 0:
             print "BUILD FAILED"
             return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())