Reformat Gentoo install instructions to 80 columns

docs/sources/installation/gentoolinux.rst

@@ -11,7 +11,10 @@ Gentoo Linux
 
 .. include:: install_unofficial.inc
 
-Installing Docker on Gentoo Linux can be accomplished by using the overlay provided at https://github.com/tianon/docker-overlay.  The most up-to-date documentation for properly installing the overlay can be found in the overlay README.  The information here is provided for reference, and may be out of date.
+Installing Docker on Gentoo Linux can be accomplished by using the overlay
+provided at https://github.com/tianon/docker-overlay.  The most up-to-date
+documentation for properly installing the overlay can be found in the overlay
+README.  The information here is provided for reference, and may be out of date.
 
 Installation
 ^^^^^^^^^^^^
@@ -22,30 +25,49 @@ Ensure that layman is installed:
 
    sudo emerge -av app-portage/layman
 
-Using your favorite editor, add ``https://raw.github.com/tianon/docker-overlay/master/repositories.xml`` to the ``overlays`` section in ``/etc/layman/layman.cfg`` (as per instructions on the `Gentoo Wiki <http://wiki.gentoo.org/wiki/Layman#Adding_custom_overlays>`_), then invoke the following:
+Using your favorite editor, add
+``https://raw.github.com/tianon/docker-overlay/master/repositories.xml`` to the
+``overlays`` section in ``/etc/layman/layman.cfg`` (as per instructions on the
+`Gentoo Wiki <http://wiki.gentoo.org/wiki/Layman#Adding_custom_overlays>`_),
+then invoke the following:
 
 .. code-block:: bash
 
    sudo layman -f -a docker
 
-Once that completes, the ``app-emulation/lxc-docker`` package will be available for emerge:
+Once that completes, the ``app-emulation/lxc-docker`` package will be available
+for emerge:
 
 .. code-block:: bash
 
    sudo emerge -av app-emulation/lxc-docker
 
-If you prefer to use the official binaries, or just do not wish to compile docker, emerge ``app-emulation/lxc-docker-bin`` instead.  It is important to remember that Gentoo is still an unsupported platform, even when using the official binaries.
+If you prefer to use the official binaries, or just do not wish to compile
+docker, emerge ``app-emulation/lxc-docker-bin`` instead.  It is important to
+remember that Gentoo is still an unsupported platform, even when using the
+official binaries.
 
-The package should already include all the necessary dependencies.  For the simplest installation experience, use ``sys-kernel/aufs-sources`` directly as your kernel sources.  If you prefer not to use ``sys-kernel/aufs-sources``, the portage tree also contains ``sys-fs/aufs3``, which contains the patches necessary for adding AUFS support to other kernel source packages (and a ``kernel-patch`` use flag to perform the patching automatically).
+The package should already include all the necessary dependencies.  For the
+simplest installation experience, use ``sys-kernel/aufs-sources`` directly as
+your kernel sources.  If you prefer not to use ``sys-kernel/aufs-sources``, the
+portage tree also contains ``sys-fs/aufs3``, which contains the patches
+necessary for adding AUFS support to other kernel source packages (and a
+``kernel-patch`` use flag to perform the patching automatically).
 
-Between ``app-emulation/lxc`` and ``app-emulation/lxc-docker``, all the necessary kernel configuration flags should be checked for and warned about in the standard manner.
+Between ``app-emulation/lxc`` and ``app-emulation/lxc-docker``, all the
+necessary kernel configuration flags should be checked for and warned about in
+the standard manner.
 
-If any issues arise from this ebuild or the resulting binary, including and especially missing kernel configuration flags and/or dependencies, `open an issue <https://github.com/tianon/docker-overlay/issues>`_ on the docker-overlay repository or ping tianon in the #docker IRC channel.
+If any issues arise from this ebuild or the resulting binary, including and
+especially missing kernel configuration flags and/or dependencies, `open an
+issue <https://github.com/tianon/docker-overlay/issues>`_ on the docker-overlay
+repository or ping tianon in the #docker IRC channel.
 
 Starting Docker
 ^^^^^^^^^^^^^^^
 
-Ensure that you are running a kernel that includes the necessary AUFS support and includes all the necessary modules and/or configuration for LXC.
+Ensure that you are running a kernel that includes the necessary AUFS support
+and includes all the necessary modules and/or configuration for LXC.
 
 OpenRC
 ------
@@ -80,7 +102,8 @@ To start on system boot:
 Network Configuration
 ^^^^^^^^^^^^^^^^^^^^^
 
-IPv4 packet forwarding is disabled by default, so internet access from inside the container will not work unless ``net.ipv4.ip_forward`` is enabled:
+IPv4 packet forwarding is disabled by default, so internet access from inside
+the container will not work unless ``net.ipv4.ip_forward`` is enabled:
 
 .. code-block:: bash
 
@@ -95,4 +118,8 @@ Or, to enable it more permanently:
 fork/exec /usr/sbin/lxc-start: operation not permitted
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Unfortunately, Gentoo suffers from `issue #1422 <https://github.com/dotcloud/docker/issues/1422>`_, meaning that after every fresh start of docker, the first docker run fails due to some tricky terminal issues, so be sure to run something trivial (such as ``docker run -i -t busybox echo hi``) before attempting to run anything important.
+Unfortunately, Gentoo suffers from `issue #1422
+<https://github.com/dotcloud/docker/issues/1422>`_, meaning that after every
+fresh start of docker, the first docker run fails due to some tricky terminal
+issues, so be sure to run something trivial (such as ``docker run -i -t busybox
+echo hi``) before attempting to run anything important.