README.md in pgdexter-0.3.4 vs README.md in pgdexter-0.3.5

@@ -102,11 +102,11 @@
 
 ```sh
 dexter <connection-options> <file1> <file2>
 ```
 
-or collect running queries with: [master]
+or collect running queries with:
 
 ```sh
 dexter <connection-options> --pg-stat-activity
 ```
 
@@ -213,10 +213,14 @@
 
 ## Thanks
 
 This software wouldn’t be possible without [HypoPG](https://github.com/dalibo/hypopg), which allows you to create hypothetical indexes, and [pg_query](https://github.com/lfittl/pg_query), which allows you to parse and fingerprint queries. A big thanks to Dalibo and Lukas Fittl respectively.
 
+## Research
+
+This is known as the Index Selection Problem (ISP).
+
 ## Contributing
 
 Everyone is encouraged to help improve this project. Here are a few ways you can help:
 
 - [Report bugs](https://github.com/ankane/dexter/issues)
@@ -234,7 +238,8 @@
 ```
 
 To run tests, use:
 
 ```sh
+createdb dexter_test
 rake test
 ```