generic_erb.rb: explicit_trim_line

* tool/generic_erb.rb: enable explicit_trim_line mode

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48304 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/generic_erb.rb

@@ -20,7 +20,7 @@ opt = OptionParser.new do |o|
   o.order!(ARGV)
 end
 template = ARGV.shift or abort opt.to_s
-erb = ERB.new(File.read(template), nil, '%')
+erb = ERB.new(File.read(template), nil, '%-')
 erb.filename = template
 result = source ? erb.src : erb.result
 if output