Merge pull request rack#82 from brchristian/patch-1

Fix typo in README.md

Author: ktheory

README.md

@@ -113,7 +113,7 @@ end
 ```ruby
 # Block requests from 1.2.3.4
 Rack::Attack.blacklist('block 1.2.3.4') do |req|
-  # Request are blocked if the return value is truthy
+  # Requests are blocked if the return value is truthy
   '1.2.3.4' == req.ip
 end