Update instructions for running tests

Author: nelstrom

README.md

@@ -86,25 +86,13 @@ Specs are currently broken. :-/
 Running the specs
 -----------------
 
-To run the specs, you call vspec as follows:
+Set up the testing environment by running this command from the project root:
 
-    vspec [{non-standard-runtimepath} ...] {input-script}
+    bundle install
 
-In this case, the non-standard runtimepath must include the vspec plugin, the textobj-user plugin (which is a dependency for this plugin) and this plugin.
+Then you can run the tests with rake:
 
-Assuming you use [pathogen][] to manage your plugins, then the plugins required to run the test suite will be found in the following locations:
-
-    ~/dotfiles
-              /vim
-                  /bundle
-                         /vim-textobj-user
-                         /vim-textobj-rubyblock
-                         /vim-vspec
-
-So to run the `basic.input` tests, you would run:
-
-    cd ~/dotfiles/vim/bundle/vim-textobj-rubyblock
-    ../vim-vspec/bin/vspec ../vim-vspec/ ../vim-textobj-user/ . test/rubyblock_test.vim
+    bundle exec rake test
 
 Generating a vimball
 --------------------