shell processlist command is broken

hbase(main):008:0> help 'processlist'
Show regionserver task list.

  hbase> processlist
  hbase> processlist 'all'
  hbase> processlist 'general'
  hbase> processlist 'handler'
  hbase> processlist 'rpc'
  hbase> processlist 'operation'
  hbase> processlist 'all','host187.example.com'
  hbase> processlist 'all','host187.example.com,16020'
  hbase> processlist 'all','host187.example.com,16020,1289493121758'

hbase(main):009:0> processlist 'all'
3377 tasks as of: 2019-11-13 22:58:57

ERROR: too few arguments

For usage try 'help "processlist"'

Took 2.2107 seconds