Ruby » Ruby master

no longer rescue exceptions of #coerce in Integer#step

• numeric.c (num_step_negative_p): no more error hiding.
• test/ruby/test_float.rb, test/ruby/test_numeric.rb:
  follow the change. [Feature #7688]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58475 b2dd03c8-39d4-4d8f-98ff-823fe69b080e