Updated SC2144 (markdown)

SC2144.md

@@ -45,9 +45,24 @@ for f in /path/to/your/files*; do
 done
 ```
 
+
+
 ### Exceptions
 
-If filename expansion (globbing) is disabled (`set -f`), then the `[` statement works as expected.
+If you are sure there will only ever be exactly 0 or 1 matches -- and `nullglob` is not enabled -- then the test happens to work.
+
+You may still want to consider making this assumption explicit and failing fast if it's ever violated:
+
+```
+files=( dir/file* )
+[ "${#files[@]}" -ge 2 ] || exit 1
+if [ -e "${files[0]}" ]
+then 
+  echo "The file exists"
+else
+  echo "No such file"
+fi
+```
 
 ### Related resources: