Merge pull request #51 from viralpraxis/actualize-readme

Actualize README.md

README.md

@@ -1,7 +1,7 @@
 # RuboCop::ThreadSafety
 
 Thread-safety analysis for your projects, as an extension to
-[RuboCop](https://github.com/bbatsov/rubocop).
+[RuboCop](https://github.com/rubocop/rubocop).
 
 ## Installation and Usage
 
@@ -60,6 +60,8 @@ Improvements that would make shared state thread-safe include:
 * Use [`RequestStore`](https://github.com/steveklabnik/request_store)
 * Use `Thread.current[:name]`
 
+Certain system calls, such as `chdir`, affect the entire process. To avoid potential thread-safety issues, it's preferable to use (if possible) the `chdir` option in methods like `Kernel.system` and `IO.popen` rather than relying on `Dir.chdir`.
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.