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#### 7.2.5 ?

`(? [command])`
  Gives one-line usage summary for `command`. Command may include `*`s as wildcards; see also `(?? ...)`. One-line command help; lists names only if multiple commands match. `?` is a synonym for `(help ...)`

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#### 7.2.54 help

`(help [command])`
  Command may include `*`s as wildcards; see also `(?? ...)` One-line command help; lists names only if multiple commands match.