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Add a note how to run specs under older Ruby versions

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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eregon 2018-08-17 11:22:55 +00:00
parent 1630728e9d
commit a88e5cccba

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@ -22,6 +22,13 @@ Currently, the only module which is MRI-specific is `RubyVM`.
Version guards (`ruby_version_is`) must be added for new features or features
which change behavior or are removed. See `spec/ruby/CONTRIBUTING.md` for details.
To verify specs are compatible with older Ruby versions:
```
cd spec/ruby
$RUBY_MANAGER use 2.3.7
../mspec/bin/mspec -j
```
## Running ruby/spec
To run all specs: