* `-j` option for concurrent test with threads
* `-jN` uses N threads
* `-j` uses nproc/2 threads
* Introduce `BT` struct to manage configurations
* Introduce `Assertion` to manage all assertions
* Remove all toplevel instance variables
* Show elapsed seconds at last
```
$ time make btest
...
real 0m37.319s
user 0m26.221s
sys 0m16.534s
$ time make btest TESTOPTS=-j
...
real 0m11.812s
user 0m36.667s
sys 0m21.872s
```
remove tests for $SAFE=4.
* lib/pp.rb: use taint instead of untrust to avoid warnings when
$VERBOSE is set to true.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
touching.
* load.c (rb_feature_provided): new function to return the loading
path in addition to rb_provided().
* load.c (search_required): sets path if loading.
* variable.c (autoload_provided): load paths are expanded to check
if loading.
* variable.c (autoload_node): keeps autoload mark while loading.
[ruby-core:20235]
* variable.c (rb_const_get_0): loops while autoload mark is set.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20531 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
features, loading or loaded features are already expanded in 1.9.
* variable.c (rb_autoload_load): no needs to check if provided before
rb_require_safe. [ruby-dev:34266]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15920 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
