diff --git a/README.md b/README.md
index d3488569..df320c20 100644
--- a/README.md
+++ b/README.md
@@ -1,32 +1,58 @@
 # Simple Ruby Version Management: rbenv
 
-rbenv lets you easily switch between multiple versions of Ruby. It's simple, unobtrusive, understandable, and follows in the Unix tradition of single-purpose tools that do one thing well. 
+rbenv lets you easily switch between multiple versions of Ruby. It's
+simple, unobtrusive, understandable, and follows in the Unix tradition
+of single-purpose tools that do one thing well.
 
 ### rbenv _does…_
 
 * Let you **change the default Ruby version** on a per-user basis.
 * Provide support for **per-project Ruby versions**.
-* Allow you to **override the Ruby version** with an environment variable.
+* Allow you to **override the Ruby version** with an environment
+  variable.
 
 ### rbenv _does not…_
 
-* **Need to be loaded into your shell.** Instead, rbenv's shim approach works by adding a directory to your `$PATH`.
+* **Need to be loaded into your shell.** Instead, rbenv's shim
+    approach works by adding a directory to your `$PATH`.
 * **Override shell commands like `cd`.** That's just obnoxious!
-* **Have a configuration file.** There's nothing to configure except which version of Ruby you want to use.
-* **Install Ruby.** You can build and install Ruby yourself, or use [ruby-build](https://github.com/sstephenson/ruby-build.git) to automate the process.
-* **Manage gemsets.** [Bundler](http://gembundler.com/) is a better way to manage application dependencies. If you have projects that are not yet using Bundler you can install the [rbenv-gemset](https://github.com/jamis/rbenv-gemset) plugin.
-* **Require changes to Ruby libraries for compatibility.** The simplicity of rbenv means as long as it's in your `$PATH`, [nothing](https://rvm.beginrescueend.com/integration/bundler/) [else](https://rvm.beginrescueend.com/integration/capistrano/) needs to know about it.
-* **Prompt you with warnings when you switch to a project.** Instead of executing arbitrary code, rbenv reads just the version name from each project. There's nothing to "trust."
+* **Have a configuration file.** There's nothing to configure except
+    which version of Ruby you want to use.
+* **Install Ruby.** You can build and install Ruby yourself, or use
+    [ruby-build](https://github.com/sstephenson/ruby-build.git) to
+    automate the process.
+* **Manage gemsets.** [Bundler](http://gembundler.com/) is a better
+    way to manage application dependencies. If you have projects that
+    are not yet using Bundler you can install the
+    [rbenv-gemset](https://github.com/jamis/rbenv-gemset) plugin.
+* **Require changes to Ruby libraries for compatibility.** The
+    simplicity of rbenv means as long as it's in your `$PATH`,
+    [nothing](https://rvm.beginrescueend.com/integration/bundler/)
+    [else](https://rvm.beginrescueend.com/integration/capistrano/)
+    needs to know about it.
+* **Prompt you with warnings when you switch to a project.** Instead
+    of executing arbitrary code, rbenv reads just the version name
+    from each project. There's nothing to "trust."
 
 ## How It Works
 
-rbenv operates on the per-user directory `~/.rbenv`. Version names in rbenv correspond to subdirectories of `~/.rbenv/versions`. For example, you might have `~/.rbenv/versions/1.8.7-p354` and `~/.rbenv/versions/1.9.3-preview1`. 
+rbenv operates on the per-user directory `~/.rbenv`. Version names in
+rbenv correspond to subdirectories of `~/.rbenv/versions`. For
+example, you might have `~/.rbenv/versions/1.8.7-p354` and
+`~/.rbenv/versions/1.9.3-preview1`.
 
-Each version is a working tree with its own binaries, like `~/.rbenv/versions/1.8.7-p354/bin/ruby` and `~/.rbenv/versions/1.9.3-preview1/irb`. rbenv makes _shim binaries_ for every such binary across all installed versions of Ruby.
+Each version is a working tree with its own binaries, like
+`~/.rbenv/versions/1.8.7-p354/bin/ruby` and
+`~/.rbenv/versions/1.9.3-preview1/irb`. rbenv makes _shim binaries_
+for every such binary across all installed versions of Ruby.
 
-These shims are simple wrapper scripts that live in `~/.rbenv/shims` and detect which Ruby version you want to use. They insert the directory for the selected version at the beginning of your `$PATH` and then execute the corresponding binary. 
+These shims are simple wrapper scripts that live in `~/.rbenv/shims`
+and detect which Ruby version you want to use. They insert the
+directory for the selected version at the beginning of your `$PATH`
+and then execute the corresponding binary.
 
-Because of the simplicity of the shim approach, all you need to use rbenv is `~/.rbenv/shims` in your `$PATH`.
+Because of the simplicity of the shim approach, all you need to use
+rbenv is `~/.rbenv/shims` in your `$PATH`.
 
 ## Installation
 
@@ -37,47 +63,65 @@ rbenv is a young project, so for now you must install it from source.
         $ cd
         $ git clone git://github.com/sstephenson/rbenv.git .rbenv
 
-2. Add `~/.rbenv/bin` to your `$PATH` for access to the `rbenv` command-line utility.
+2. Add `~/.rbenv/bin` to your `$PATH` for access to the `rbenv`
+command-line utility.
 
         $ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> .bash_profile
 
-3. Add rbenv's shims directory to your `$PATH` and set up Bash autocompletion. (If you prefer not to load rbenv in your shell, you can manually add `$HOME/.rbenv/shims` to your path in step 2.)
+3. Add rbenv's shims directory to your `$PATH` and set up Bash
+autocompletion. (If you prefer not to load rbenv in your shell, you
+can manually add `$HOME/.rbenv/shims` to your path in step 2.)
 
         $ echo 'eval "$(rbenv init -)"' >> .bash_profile
 
 4. Restart your shell. You can now begin using rbenv.
 
-        $ exec $SHELL
+        $ exec
 
-5. Install Ruby versions into `~/.rbenv/versions`. For example, to install Ruby 1.9.2-p290, download and unpack the source, then run:
+5. Install Ruby versions into `~/.rbenv/versions`. For example, to
+install Ruby 1.9.2-p290, download and unpack the source, then run:
 
         $ ./configure --prefix=~/.rbenv/versions/1.9.2-p290
         $ make
         $ make install
 
-    The [ruby-build](https://github.com/sstephenson/ruby-build) project simplifies this process to a single command:
+    The [ruby-build](https://github.com/sstephenson/ruby-build)
+    project simplifies this process to a single command:
 
         $ ruby-build 1.9.2-p290 ~/.rbenv/versions/1.9.2-p290
 
-6. Rebuild the shim binaries. You should do this any time you install a new Ruby binary (for example, when installing a new Ruby version, or when installing a gem that provides a binary).
+6. Rebuild the shim binaries. You should do this any time you install
+a new Ruby binary (for example, when installing a new Ruby version, or
+when installing a gem that provides a binary).
 
         $ rbenv rehash
 
 ## Usage
 
-Like `git`, the `rbenv` command delegates to subcommands based on its first argument. The most common subcommands are:
+Like `git`, the `rbenv` command delegates to subcommands based on its
+first argument. The most common subcommands are:
 
-* **set-default** — sets the default version of Ruby to be used in all shells by writing the version name to the `~/.rbenv/default` file. This version can be overridden by a per-project `.rbenv-version` file, or by setting the `RBENV_VERSION` environment variable.
+* **set-default** — sets the default version of Ruby to be used in all
+    shells by writing the version name to the `~/.rbenv/default`
+    file. This version can be overridden by a per-project
+    `.rbenv-version` file, or by setting the `RBENV_VERSION`
+    environment variable.
 
         $ rbenv set-default 1.9.2-p290
 
-    The special version name `system` tells rbenv to use the system Ruby (detected by searching your `$PATH`).
+    The special version name `system` tells rbenv to use the system
+    Ruby (detected by searching your `$PATH`).
 
-* **set-local** — sets a local per-project Ruby version by writing the version name to an `.rbenv-version` file in the current directory. This version overrides the default, and can be overridden itself by setting the `RBENV_VERSION` environment variable.
+* **set-local** — sets a local per-project Ruby version by writing the
+    version name to an `.rbenv-version` file in the current
+    directory. This version overrides the default, and can be
+    overridden itself by setting the `RBENV_VERSION` environment
+    variable.
 
         $ rbenv set-local rbx-1.2.4
 
-* **versions** — lists all Ruby versions known to rbenv, and shows an asterisk next to the currently active version.
+* **versions** — lists all Ruby versions known to rbenv, and shows an
+    asterisk next to the currently active version.
 
         $ rbenv versions
           1.8.7-p352
@@ -87,16 +131,20 @@ Like `git`, the `rbenv` command delegates to subcommands based on its first argu
           rbx-1.2.4
           ree-1.8.7-2011.03
 
-* **version** — displays the currently active Ruby version, along with information on how it was set.
+* **version** — displays the currently active Ruby version, along with
+    information on how it was set.
 
         $ rbenv version
         1.8.7-p352 (set by /Volumes/37signals/basecamp/.rbenv-version)
 
 ## Contributing
 
-The rbenv source code is [hosted on GitHub](https://github.com/sstephenson/rbenv). It's clean, modular, and easy to understand, even if you're not a shell hacker.
+The rbenv source code is [hosted on
+GitHub](https://github.com/sstephenson/rbenv). It's clean, modular,
+and easy to understand, even if you're not a shell hacker.
 
-Please feel free to submit pull requests and file bugs on the [issue tracker](https://github.com/sstephenson/rbenv/issues).
+Please feel free to submit pull requests and file bugs on the [issue
+tracker](https://github.com/sstephenson/rbenv/issues).
 
 ## License