Fix a few things

Author: muglug

README.md

@@ -1,6 +1,6 @@
 # PHP MySQL Engine
 
-PHP MySQL Engine is a unit testing library for PHP. It enables testing database-driven applications with an in-memory simulation of MySQL. This project extends the `PDO` class and allows you to call common PDO MySQL methods. It supports a wide variety of queries, and some PDO-specific functionality like transactions and different fetch modes.
+PHP MySQL Engine is a library for PHP that allows you to test database-driven applications with an in-memory simulation of MySQL. This project extends the `PDO` class and allows you to call common PDO MySQL methods. It supports a wide variety of queries, and some PDO-specific functionality like transactions and different fetch modes.
 
 PHP MySQL Engine is based on Slack's [Hack SQL Fake](https://github.com/slackhq/hack-sql-fake) created by [Scott Sandler](https://github.com/ssandler).
 
@@ -12,7 +12,7 @@ Currently there are two ways to test code that reads and writes to a database:
   Mocks require an explicit list of queries that are expected to run and results to return. This leads to significant manual work setting up expectations, and tests which are fragile and must be updated even on benign changes to the code or queries. It also means the data access layer is not unit tested.
 
 - Use an actual database<br />
-  It might make sense to test with a separate database instance – this is we have done at Vimeo. But databases like MySQL are designed to be filled with lots of long-lasting data, whereas unit tests write small amounts of very short-lived data. This means that extra care has to be taken to make sure that test databases are truncated between tests, which creates a performance issue.
+  It might make sense to test with a separate database instance – this is what we have done in the past at Vimeo. But databases like MySQL are designed to be filled with lots of long-lasting data, whereas unit tests write small amounts of very short-lived data. This means that extra care has to be taken to make sure that test databases are truncated between tests, which creates a performance issue.
 
 PHP MySQL Engine takes a different approach - it parses and executes `SELECT`, `INSERT`, `UPDATE`, and `DELETE` queries against an in-memory "database" stored in PHP arrays. As long as the amount of data used for testing is small, this solves the problems mentioned above.