Teach eval the correct line number to report.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3117 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/set.rb

@@ -702,7 +702,7 @@ end
 # end
 
 if $0 == __FILE__
-  eval DATA.read
+  eval DATA.read, nil, $0, __LINE__+4
 end
 
 __END__