Add get_gpio to man pages

https://github.com/Hamlib/Hamlib/issues/1121

doc/man1/rigctl.1

@@ -1415,14 +1415,10 @@ Sets GPIO1, GPIO2, GPIO3, GPIO4 on the GPIO ptt port
 Can also use 1,2,3,4
 .
 .TP
-.BR XXXX
+.BR get_gpio " \(aq" \fIGPIO#\fP "\(aq
 .EX
-Stuff
+Reads GPIO1, GPIO2, GPIO3, GPIO4 on the GPIO ptt port
-.
+Can also use 1,2,3,4
-.TP
-.BR XXXX
-.EX
-Stuff
 .
 .SH READLINE
 .

doc/man1/rigctld.1

@@ -1222,32 +1222,27 @@ Examples:
 .EX
 Returns hamlib version with ISO8601 date/time
 .
-+.TP
+.TP
-+.BR hamlib_version
+.BR hamlib_version
-+.EX
+.EX
-+Returns hamlib version with ISO8601 date/time
+Returns hamlib version with ISO8601 date/time
-+.
+.
-+.TP
+.TP
-+.BR test
+.BR test
-+.EX
+.EX
-+Performs test routines.  Under development.
+Performs test routines.  Under development.
-+.
+.
-+.TP
+.TP
-+.BR set_gpio " \(aq" \fIGPIO#\fP "\(aq
+.BR set_gpio " \(aq" \fIGPIO#\fP "\(aq
-+.EX
+.EX
-+Sets GPIO1, GPIO2, GPIO3, GPIO4 on the GPIO ptt port
+Sets GPIO1, GPIO2, GPIO3, GPIO4 on the GPIO ptt port
-+Can also use 1,2,3,4
+Can also use 1,2,3,4
-+.
+.
-+.TP
+.TP
-+.BR XXXX
+.BR get_gpio " \(aq" \fIGPIO#\fP "\(aq
-+.EX
+.EX
-+Stuff
+Reads GPIO1, GPIO2, GPIO3, GPIO4 on the GPIO ptt port
-+.
+Can also use 1,2,3,4
-+.TP
-+.BR XXXX
-+.EX
-+Stuff
-
 .
 .SH PROTOCOL
 .