https://github.com/eregon/ruby/tree/benchmark
  patched by Benoit Daloze. [ruby-core:37593] [Bug #4940]

* lib/benchmark (Benchmark#bmbm): bmbm should be consistent with bm
  for the return value.

* test/benchmark: remove preemptive test instead of skipping
  I removed the preemptive test I wrote for Feature #4197.
  I'll add it back when the implementation will be able to satisfy it.

* lib/benchmark (Benchmark#bmbm): remove useless explicit call,
  #format is an alias of #to_s test/benchmark: add a test for
  format of long time.

* lib/benchmark: fix label width: always add 1 to ensure there is a
  space delimiter even with times over 100s
  When I asked for Feature #4197, I wanted to make delimiting spaces
  consistent for #bm and #bmbm.
  But with times over 100s, the output contains no space between the
  label and the first time (user).
  Now both ensure there is always a space, even if that means 3 spaces
  with times under 10s (because it is formatted as %10.6f)

* test/benchmark: let labels be a constant
  lib/benchmark (Benchmark#realtime): avoid creating an unused Proc
  lib/benchmark (Benchmark#benchmark): use ensure clause to restore
  STDOUT.sync, as in #bmbm

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e