ICM: Readme fixes.

Author: dmitry-ivanov

README.md

@@ -102,7 +102,7 @@ class MyProtectedCommand extends Command
 
 ### Set custom timeout
 
-By default mutex is checking for a running command, and if it finds such it just exits. However, you can manually set
+By default mutex is checking for a running command, and if it finds such, it just exits. However, you can manually set
 timeout for a mutex, so it can wait for another command to finish it's execution, instead of just quitting immediately.
 
 You can change mutex timeout by specifying `$mutexTimeout` field: