set indent [on|off|toggle]
When turned on, long lines will be wrapped such that they are indented to the same position as the second word on the first line. Subsequent wrapping of the same line will be indented to the same place.
If CONTINUED_LINE is also set, the client will pad the wrapped portions of the line with the CONTINUED_LINE contents, unless CONTINUED_LINE happens to be longer than the indented space. CONTINUED_LINE will not be truncated in this event; it is either displayed in full, or not at all.
The client will never indent a line more than one-third the width of the screen when INDENT is enabled.