Spell out [info exists] in example code for [exit] command.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/exit.n b/doc/exit.n
index ab5c87d..9b4ad20 100644
--- a/doc/exit.n
+++ b/doc/exit.n
@@ -35,7 +35,7 @@ proc main {} {
 
 if {[catch {main} msg options]} {
     puts stderr "unexpected script error: $msg"
-    if {[info exist env(DEBUG)]} {
+    if {[info exists env(DEBUG)]} {
         puts stderr "---- BEGIN TRACE ----"
         puts stderr [dict get $options -errorinfo]
         puts stderr "---- END TRACE ----"