README.markdown in r10k-1.2.0 vs README.markdown in r10k-1.2.1

@@ -16,35 +16,39 @@
 implementation of Puppet [dynamic environments][workflow].
 
 Installation
 ------------
 
-r10k should be compatible with Ruby 1.8.7, 1.9.3, and 2.0.0. Any issue with
-those versions should be considered a bug.
+r10k supports the following Ruby versions:
 
+  - 1.8.7 (POSIX minimum version)
+  - 1.9.3 (Windows minimum version)
+  - 2.0.0
+  - 2.1.0
+
 ### Rubygems
 
 For general use, you should install r10k from Ruby gems:
 
     gem install r10k
-    r10k --help
+    r10k help
 
 ### Bundler
 
 If you have more specific needs or plan on modifying r10k you can run it out of
 a git repository using Bundler for dependencies:
 
     git clone git://github.com/adrienthebo/r10k
     cd r10k
     bundle install
-    bundle exec r10k --help
+    bundle exec r10k help
 
 ### Puppet Enterprise
 
 Puppet Enterprise uses its own Ruby, so you need to use the correct version of gem when installing r10k.
 
     /opt/puppet/bin/gem install r10k
-    r10k --help
+    r10k help
 
 Common Commands
 ---------------
 
 ### Deploy all environments and Puppetfile specified modules