google-java-format does not enforce rules 2.3.1 (inside strings) or 2.3.2

[novalis]

https://google.github.io/styleguide/javaguide.html#s2.3.1-whitespace-characters

The 2.3.1 problem is only in the sentence "All other whitespace characters in string and character literals are escaped": google-java-format doesn't replace a literal tab inside a string with \t.

[cushon]

The formatter doesn't try to fix all style errors, only ones what involve whitespace between tokens. Replacing literal whitespace with escapes inside string literals seems feasible but slightly outside its mandate.