merge revision(s) 42439,42453: [Backport #8752]

* test/coverage/test_coverage.rb (TestCoverage#test_big_code): use `1'
	  instead of `p' to get rid of a side effect.
	  Kernel#p without any argument seems to do nothing, but flushes stdout.
	  and, if stdout is redirected to file, fsync() will be called on
	  Windows.  so, when running test-all on Windows with redirection, such
	  as CI environment, this test took a lot of time.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/coverage/test_coverage.rb

@@ -47,7 +47,7 @@ class TestCoverage < Test::Unit::TestCase
     Dir.mktmpdir {|tmp|
       Dir.chdir(tmp) {
         File.open("test.rb", "w") do |f|
-          f.puts "p\n" * 10000
+          f.puts "__id__\n" * 10000
           f.puts "def ignore(x); end"
           f.puts "ignore([1"
           f.puts "])"