add some documentation as requested

src/jsone.erl

@@ -193,6 +193,9 @@
 %% `native_utf8': <br />
 %% - Encodes UTF-8 characters as a human-readable(non-escaped) string <br />
 %%
+%% `canonical_form': <br />
+%% - produce a canonical form of a JSON document <br />
+%%
 %% `{float_format, Optoins}':
 %% - Encodes a `float()` value in the format which specified by `Options' <br />
 %% - default: `[{scientific, 20}]' <br />