Rustdoc assumes indented code is Rust code, but when it isn't, the docs
fail to build. The Sheets API has Java, Objective-C, and JavaScript
examples in its descripiton. Wrap these examples in language-tagged
triple-backticks to prevent rustdoc from trying to compile them.
Fixes#213.
Using `make update-json`, all json descriptions have been update.
Quite interesting to see that there are plenty of new ones which
are giving 404 when queried. An actual bug, or something I should
look into ?