Merge pull request rubygems#15 from jasonmp85/patch-1

Explanation of approximate dependencies incorrect

src/pages/gemfile.haml

@@ -35,7 +35,7 @@
       Most of the version specifiers, like <code>>= 1.0</code>, are self-explanatory.
       The specifier <code>~></code> has a special meaning, best shown by example.
       <code>~> 2.0.3</code> is identical to <code>>= 2.0.3</code> and <code>< 2.1</code>.
-      <code>~> 2.1</code> is identical to <code>>= 2.1</code> and <code>< 2.2</code>.
+      <code>~> 2.1</code> is identical to <code>>= 2.1</code> and <code>< 3.0</code>.
       <code>~> 2.2.beta</code> will match prerelease versions like <code>2.2.beta.12</code>.
 
   .bullet