Reddit prove failed when using commandline

as topic says, reddit prove fails when using command line
"keybase prove reddit" command gives posting url, but message will cut on reddit

https://www.reddit.com/r/KeybaseProofs/comments/33q8wu/my_keybase_proof_redditterokorp_keybasethasan/

I hope reddit dosen't delete that message. I mark it deleted before even think about bugreport, but it seems to be still there.

Start by reproducing the issue with `keybase prove reddit` and inspect the posting URL shown in the report. Compare the generated message with the Reddit post to determine where the text is cut; done means the command produces a complete Reddit proof message.

Written by the indexing model from the issue text.