merge revision(s) 58210: [Backport #8916]
vsnprintf.c: prefix with precision * vsnprintf.c (BSD_vfprintf): sign and hex-prefix should not be counted in precision. [ruby-dev:47714] [Bug #8916]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@59299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 58210: [Backport #8916]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@59299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e