Fix examples in documentation (#308)

Co-authored-by: Nathan Bierema <[email protected]>

Author: dayures

docs/formatters.md

@@ -46,7 +46,7 @@ but you can use it programmatically too:
 ```javascript
 var delta = jsondiffpatch.diff(left, right);
 var output = jsondiffpatch.formatters.console.format(delta);
-console.log(delta);
+console.log(output);
 
 // or simply
 jsondiffpatch.console.log(delta);
@@ -57,7 +57,7 @@ jsondiffpatch.console.log(delta);
 ```javascript
 var delta = jsondiffpatch.diff(left, right);
 var output = jsondiffpatch.formatters.jsonpatch.format(delta);
-console.log(delta);
+console.log(output);
 ```
 
 _Don't use with `textDiff` as it isn't suppported_