Push/pull in comment

Dependencies

• [2] QWD7UE76 push/pull: rename `channel` option
• [3] 5HF7C67M push/pull: fixed "changes" arguments
• [4] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [5] AEPEFS7O Write help for each argument

Change contents

• replacement in pijul/src/commands/pushpull.rs at line 95
  [2.135]→[3.2167:2192](∅→∅),[3.113691]→[3.2167:2192](∅→∅)
  − /// Push all changes
  [2.135]

  [3.155]
  + /// Pull all changes