Massive spaces->tabs and trailing whitespace cleanup, hopefully for the last

time now I've configured emacs to make them displayed in really annoying
colours...

cmd-list-panes.c

@@ -23,7 +23,7 @@
 #include "tmux.h"
 
 /*
- * List panes on given window..
+ * List panes on given window.
  */
 
 int	cmd_list_panes_exec(struct cmd *, struct cmd_ctx *);

tty-term.c

@@ -321,10 +321,12 @@ tty_term_find(char *name, int fd, const char *overrides, char **cause)
 	if (setupterm(name, fd, &error) != OK) {
 		switch (error) {
 		case 1:
-			xasprintf(cause, "can't use hardcopy terminal: %s", name);
+			xasprintf(
+			    cause, "can't use hardcopy terminal: %s", name);
 			break;
 		case 0:
-			xasprintf(cause, "missing or unsuitable terminal: %s", name);
+			xasprintf(
+			    cause, "missing or unsuitable terminal: %s", name);
 			break;
 		case -1:
 			xasprintf(cause, "can't find terminfo database");

tty.c

@@ -1120,8 +1120,8 @@ tty_cursor(struct tty *tty, u_int cx, u_int cy)
 		change = thisy - cy;	/* +ve up, -ve down */
 
 		/*
-		 * Try to use VPA if change is larger than absolute or if this change
-		 * would cross the scroll region, otherwise use CUU/CUD.
+		 * Try to use VPA if change is larger than absolute or if this
+		 * change would cross the scroll region, otherwise use CUU/CUD.
 		 */
 		if (abs(change) > cy ||
 		    (change < 0 && cy - change > tty->rlower) ||