handle $EDITOR that has whitespace

[josharian]

 $ tk edit exe-vzy5
  /opt/homebrew/bin/tk: line 1315: code -w: command not found

fix is obvious and trivial:

diff --git i/ticket w/ticket
index 342678e..de8391c 100755
--- i/ticket
+++ w/ticket
@@ -1312,7 +1312,7 @@ cmd_edit() {
     file=$(ticket_path "$1") || return 1

     if [ -t 0 ] && [ -t 1 ]; then
-        "${EDITOR:-vi}" "$file"
+        ${EDITOR:-vi} "$file"
     else
         echo "Edit ticket file: $file"
     fi

have it patched in locally, courtesy filing an issue.