psql help message contains excessive indentations

This topic is extracted from [1].

As mentioned there, in psql, running \? displays the following lines.

> \gdesc describe result of query, without executing it
> \gexec execute query, then execute each value in its result
> \gset [PREFIX] execute query and store result in psql variables
> \gx [(OPTIONS)] [FILE] as \g, but forces expanded output mode
> \q quit psql
> \watch [[i=]SEC] [c=N] [m=MIN]
!> execute query every SEC seconds, up to N times
!> stop if less than MIN rows are returned

The last two lines definitely have some extra indentation.
I've attached a patch that fixes this.

[1] https://www.postgresql.org/message-id/20230830.103356.1909699532104167477.horikyota.ntt@gmail.com

regards.

--
Kyotaro Horiguchi
NTT Open Source Software Center