Increment the lines counter when skipping a line to avoid an infinite

loop, and fix a check to avoid a potential out-of-bounds access. Problem
reported by Yuxiang Qin and tracked down by Karl Beldan; GitHub issue
1352.

Also a man page fix request by jmc@.

tmux.1

@@ -3585,7 +3585,8 @@ and
 .Ql #} ,
 unless they are part of a
 .Ql #{...}
-replacement. For example:
+replacement.
+For example:
 .Bd -literal -offset indent
 #{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .
 .Ed