Print a footer after doctor output

bin/doctor

@@ -14,6 +14,9 @@ function indent_to_level() {
 function print_doctor_header() {
   echo "== Overleaf Doctor =="
 }
+function print_doctor_footer() {
+  echo "== End =="
+}
 
 function print_heading() {
   _name="$1"
@@ -110,6 +113,7 @@ function __main__() {
   check_host_information
   check_dependencies
   check_docker_daemon
+  print_doctor_footer
 }
 
 __main__ "$@"