Add example of `--list-different` flag usage to readme (#1665)
Add example of `--list-different` flag usage to readme (#1665)

* Add example of `--list-different` flag usage to readme

* review fixes

* typo

* add code blocks

existentialism/prettier,arijs/prettier-with-tabs,lydell/prettier,azz/prettier,Skywalker13/prettier-space-parenthesis,azz/prettier,jlongster/prettier,rattrayalex/prettier,Skywalker13/prettier-space-parenthesis,prettier/prettier,lydell/prettier,existentialism/prettier,rattrayalex/prettier,arijs/prettier-miscellaneous,lydell/prettier,arijs/prettier-with-tabs,rattrayalex/prettier,arijs/prettier-miscellaneous,azz/prettier,azz/prettier,prettier/prettier,existentialism/prettier,prettier/prettier,Skywalker13/prettier-space-parenthesis,prettier/prettier,arijs/prettier-miscellaneous,Skywalker13/prettier-space-parenthesis,arijs/prettier-miscellaneous,lydell/prettier,existentialism/prettier