+source-filter::
+ Specifies a command which will be invoked to format plaintext blobs
+ in the tree view. The command will get the blob content on its STDIN
+ and the name of the blob as its only command line argument. The STDOUT
+ from the command will be included verbatim as the blob contents, i.e.
+ this can be used to implement e.g. syntax highlighting. Default value:
+ none.
+