Usage:
/CAT [%]
Concatenates (puts together) all subsequent lines until a line containing a single "." is typed. If the argument "%" is given, a "%;" sequence is appended to each intermediate line. The concatenated result is then executed as a single line.
The concatenated result is stored in the input history as a single line, so intermediate lines can not be recalled separately.
Example:
/cat % :foo :bar :baz .
This produces:
:foo%;:bar%;:baz
If the %{sub} flag is set on, this will expand to three lines ":foo", ":bar" and ":baz" and be sent to the socket.
See: /paste, /sub, general, history