patch 8.2.3731: "set! termcap" shows codes in one column, but not keys

Problem:    "set! termcap" shows codes in one column, but not keys.
Solution:   Also use one column for keys. (closes #9258)
diff --git a/src/option.c b/src/option.c
index 22dcfc5..c6230c4 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1218,11 +1218,12 @@
  * does not need to be expanded with option_expand().
  * "opt_flags":
  * 0 for ":set"
- * OPT_GLOBAL   for ":setglobal"
- * OPT_LOCAL    for ":setlocal" and a modeline
- * OPT_MODELINE for a modeline
- * OPT_WINONLY  to only set window-local options
- * OPT_NOWIN	to skip setting window-local options
+ * OPT_GLOBAL     for ":setglobal"
+ * OPT_LOCAL      for ":setlocal" and a modeline
+ * OPT_MODELINE   for a modeline
+ * OPT_WINONLY    to only set window-local options
+ * OPT_NOWIN	  to skip setting window-local options
+ * OPT_ONECOLUMN  do not use multiple columns
  *
  * returns FAIL if an error is detected, OK otherwise
  */
@@ -1290,7 +1291,7 @@
 	else if (STRNCMP(arg, "termcap", 7) == 0 && !(opt_flags & OPT_MODELINE))
 	{
 	    showoptions(2, opt_flags);
-	    show_termcodes();
+	    show_termcodes(opt_flags);
 	    did_show = TRUE;
 	    arg += 7;
 	}