add wildcard example

Author: Fienne

src/faq.md

@@ -447,7 +447,25 @@ those Docker format containers using the Singularity engine. Directly
 specifying a Singularity format container is not part of the CWL standards.
 
 ## How outputBinding.glob works
-The `outputBinding` section describes how to set the value of each output parameter.  The `glob` field is used to return all file paths that match a specific pattern. The value of the glob field is the `output directory` Wildcard characters can be used in the filenames when searching for files. The wildcard characters can either be an asterisk `*` or a question mark `?`.
+The `outputBinding` section describes how to set the value of each output parameter.  The `glob` field is used to return all file paths that match a specific pattern. The value of the glob field is the `output directory` Wildcard characters can be used in the filenames when searching for files. The wildcard characters can either be an asterisk `*` or a question mark `?`.  
+
+```cwl
+outputs:
+  example_out:
+    type: File
+    outputBinding:
+      glob: hello.txt
+```  
+
+The glob field in the above output section can also be written with the `*` wildcard character as
+
+```cwl
+outputs:
+  example_out:
+    type: File
+    outputBinding:
+      glob: '*.txt'
+```
 
 ## Debug JavaScript expressions