Log Message:
(devel/R-evaluate) Updated 0.21 to 0.23, make test passed

Version 0.23
================================================================================

- Prevent existing plots from leaking into `evaluate()` results
  (thanks, @dmurdoch, yihui/knitr#2297).

- If the environment variable `R_EVALUATE_BYPASS_MESSAGES` is set to
  true, the arguments `keep_message` and `keep_warning` of
  `evaluate()` will be set to `NA`, regardless of user input, which
  means messages and warnings will not be captured by
  `evaluate()`. This provides a possibility to force logging messages
  and warnings (thanks, @slodge, yihui/yihui.org#1458).

Version 0.22
================================================================================

- Fixed a problem in the internal function `plot_calls()` that made
  the examples of `recordGraphics` fail to run on its help page
  (thanks, Kurt Hornik).