Removing tabs that Windows accidentally snuck in.

tools/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2011, 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 shutil
@@ skipping 101 matching lines @@
                 target,
                 '-parallelizeTargets',
                 '-configuration',
                 build_config,
                 'SYMROOT=%s' % os.path.abspath('xcodebuild')
                 ]
       elif HOST_OS == 'win32':
         project_file = 'dart.sln'
         if os.path.exists('dart-%s.gyp' % CurrentDirectoryBaseName()):
           project_file = 'dart-%s.sln' % CurrentDirectoryBaseName()
-        if target == 'all':
+        if target == 'all':
           args = [options.devenv + os.sep + 'devenv.com',
                   '/build',
                   build_config,
                   project_file
                  ]
-        else:
+        else:
           args = [options.devenv + os.sep + 'devenv.com',
                   '/build',
                   build_config,
-                  '/project',
-                  target,
+                  '/project',
+                  target,
                   project_file
                  ]
       else:
         make = 'make'
         if HOST_OS == 'freebsd':
           make = 'gmake'
           # work around lack of flock
           os.environ['LINK'] = '$(CXX)'
         args = [make,
                 '-j',
@@ skipping 16 matching lines @@
       process.wait()
       if process.returncode != 0:
         print "BUILD FAILED"
         return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())