don't remove test results

r46180 removed dots but they express the result of tests: don't remove them.
Moreover I don't understand why `read` is still used.

http://u64.rubyci.org/~chkbuild/ruby-trunk/log/20140530T200301Z.fail.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46279 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/lib/test/unit/parallel.rb

@@ -35,9 +35,7 @@ module Test
 
         th = Thread.new do
           begin
-            while buf = (self.verbose ? i.gets : (i.readpartial(1024) || i.read(5)))
-              buf.force_encoding(Encoding::ASCII_8BIT)
-              buf.sub!(/\A\n?\.+(?!\z)/, '')
+            while buf = (self.verbose ? i.gets : i.readpartial(1024))
               _report "p", buf
             end
           rescue IOError