Python lint: Use flake8 --extend-ignore instead of --ignore (#1498)

scripts/get_emscripten_revision_info.py

@@ -8,12 +8,14 @@ import sys
 EMSCRIPTEN_RELEASES_GIT = 'https://chromium.googlesource.com/emscripten-releases'
 TAGFILE = 'emscripten-releases-tags.json'
 
+
 def get_latest_hash(tagfile):
     with open(tagfile) as f:
         versions = json.load(f)
         latest = versions['aliases']['latest']
         return versions['releases'][latest]
 
+
 def get_latest_emscripten(tagfile):
     latest = get_latest_hash(tagfile)
     if not os.path.isdir('emscripten-releases'):
@@ -30,6 +32,7 @@ def get_latest_emscripten(tagfile):
         if len(tokens) and tokens[0] == 'emscripten':
             return tokens[2]
 
+
 if __name__ == '__main__':
     emscripten_hash = get_latest_emscripten(TAGFILE)
     print('Emscripten revision ' + emscripten_hash)