Fix typo in text box overflow section of the manual.
Merge pull request #784 from airblade/patch-1

Fix typo in text box overflow section of the manual.
Run rubocop after unit tests
Merge branch 'master' of github.com:prawnpdf/prawn
Merge branch 'master' of github.com:prawnpdf/prawn into decimal_rounding
Let PDF::Core determine the level of decimal rounding precision