Update README

README.md

@@ -7,7 +7,7 @@
 [![Inline docs](http://inch-ci.org/github/mmozuras/pronto.png)](http://inch-ci.org/github/mmozuras/pronto)
 
 Pronto runs analysis quickly by checking only the relevant changes. Created to
-be used on pull requests, but suited for other scenarios as well. Perfect if you
+be used on pull requests, but also suited for other scenarios. Perfect if you
 want to find out quickly if branch introduces changes that conform to your
 [styleguide](https://github.com/mmozuras/pronto-rubocop), [are DRY](https://github.com/mmozuras/pronto-flay), [don't introduce security holes](https://github.com/mmozuras/pronto-brakeman) and [more](#runners).
 
@@ -20,49 +20,55 @@ Pronto runs the checks on a diff between the current HEAD and the provided commi
 ### GitHub Integration
 
 You can run Pronto as a step of your CI builds and get the results as comments
-on GitHub commits using `GithubFormatter`.
+on GitHub commits using `GithubFormatter` or `GithubPullRequestFormatter`.
 
 Add Pronto runners you want to use to your Gemfile:
 ```ruby
-  gem 'pronto-rubocop'
+gem 'pronto-rubocop'
 ```
 or gemspec file:
 ```ruby
-  s.add_development_dependency 'pronto-rubocop'
+s.add_development_dependency 'pronto-rubocop'
 ```
-Set the GITHUB_ACCESS_TOKEN environment variable to [OAuth token](https://help.github.com/articles/creating-an-access-token-for-command-line-use) 
-that has access to the repository. Then set up a rake task:
-```ruby
-  Pronto.gem_names.each { |gem_name| require "pronto/#{gem_name}" }
+Set the GITHUB_ACCESS_TOKEN environment variable to [OAuth token](https://help.github.com/articles/creating-an-access-token-for-command-line-use)
+that has access to the repository.
 
-  formatter = Pronto::Formatter::GithubFormatter.new
-  Pronto.run('origin/master', '.', formatter)
+Then just run it:
+```bash
+GITHUB_ACCESS_TOKEN=token pronto run -f github -c origin/master
 ```
-or run it via command line:
+or, if you want comments to appear on pull request diff, instead of commit:
+```bash
+GITHUB_ACCESS_TOKEN=token PULL_REQUEST_ID=id pronto run -f github_pr -c origin/master
 ```
- GITHUB_ACCESS_TOKEN=<token> bundle exec pronto run -f github -c origin/master
+
+As an alternative, you can also set up a rake task:
+```ruby
+Pronto.gem_names.each { |gem_name| require "pronto/#{gem_name}" }
+
+formatter = Pronto::Formatter::GithubFormatter.new # or GithubPullRequestFormatter
+Pronto.run('origin/master', '.', formatter)
 ```
 
 ### Local Changes
 
 You can run Pronto locally. First, install Pronto and the runners you want to use:
 ```bash
-  gem install pronto
-  gem install pronto-rubocop
+gem install pronto
+gem install pronto-rubocop
 ```
 Then navigate to the repository you want to run Pronto on, and:
 ```bash
-  git checkout feature/branch
-  pronto run # Pronto runs against master by default
+git checkout feature/branch
+pronto run # Pronto runs against master by default
 ```
 
-Run `pronto` in your terminal without any arguments to see what more Pronto is
-capable off.
+Just run `pronto` without any arguments to see what Pronto is capable off.
 
 ## Runners
 
 Pronto can run various tools and libraries, as long as there's a runner for it.
-Currently available runners:
+Currently available:
 
 * [pronto-rubocop](https://github.com/mmozuras/pronto-rubocop)
 * [pronto-flay](https://github.com/mmozuras/pronto-flay)