Avoid calling Ruby 2.4+ String#pretty_print in ColorPrinter
Avoid calling Ruby 2.4+ String#pretty_print in ColorPrinter

Ruby 2.4+ defines String's own pretty_print that prints multiline Strings prettier
see: https://bugs.ruby-lang.org/issues/12664

fixes #1585

gfvcastro/pry,gfvcastro/pry