method
tr!
![Some documentation Importance_1](https://d2vfyqvduarcvs.cloudfront.net/images/importance_1.png?1349367920)
tr!(p1, p2)
public
Translates str in place, using the same rules as String#tr. Returns str, or nil if no changes were made.
tr!(p1, p2)
public
Translates str in place, using the same rules as String#tr. Returns str, or nil if no changes were made.