Updated usage options in README.md

README.md

@@ -17,7 +17,7 @@ Usage: jinja2 [options] <input template> <input data>
 Options:
   --version             show program's version number and exit
   -h, --help            show this help message and exit
-  --format=FORMAT       format of input variables: auto, ini, json,
+  --format=FORMAT       format of input variables: auto, env, ini, json,
                         querystring, yaml, yml
   -e EXTENSIONS, --extension=EXTENSIONS
                         extra jinja2 extensions to load
@@ -26,6 +26,9 @@ Options:
                         Use only this section from the configuration
   --strict              Disallow undefined variables to be used within the
                         template
+  -a, --ansible         Enable support for Ansible filters
+  -o FILE, --outfile=FILE
+                        File to use for output. Default is stdout.
 ```
 
 ## Optional Ansible support