[bilibili] do not download danmaku for dry_run

src/you_get/common.py

@@ -870,7 +870,7 @@ def script_main(script_name, download, download_playlist = None):
     -y | --extractor-proxy <HOST:PORT>       Use specific HTTP proxy for extracting stream data.
          --no-proxy                          Don't use any proxy. (ignore $http_proxy)
          --debug                             Show traceback on KeyboardInterrupt.
-         --json                              Output the information of videos in json text without downloading. 
+         --json                              Output the information of videos in json text without downloading.
     '''
 
     short_opts = 'Vhfiuc:nF:o:p:x:y:'

src/you_get/extractors/bilibili.py

@@ -143,7 +143,7 @@ def bilibili_download(url, output_dir='.', merge=True, info_only=False, **kwargs
     else:
         raise NotImplementedError(flashvars)
 
-    if not info_only:
+    if not info_only and not dry_run:
         title = get_filename(title)
         print('Downloading %s ...\n' % (title + '.cmt.xml'))
         xml = get_srt_xml(id)