Clean up README.md and comments

Author: jakelee8

README.md

@@ -14,13 +14,13 @@ the utility that creates the:
 
 snapshots if it is installed.
 
-## Installation using cron
-
 This program is a posixly correct bourne shell script.  It depends only on
-the zfs utilities and cron, and can run in the dash shell (using the scripts in
-`etc`).
+the zfs utilities and cron, and can run in the dash shell (using the scripts
+in `etc`).
 
-```
+## Installation using cron
+
+```sh
 wget https://github.com/zfsonlinux/zfs-auto-snapshot/archive/master.zip
 unzip master.zip
 cd zfs-auto-snapshot-master
@@ -29,52 +29,59 @@ make install
 
 ## Installation using systemd
 
-I recommend scheduling this using [systemd timers](https://wiki.archlinux.org/index.php/Systemd/Timers).
+```sh
+wget https://github.com/zfsonlinux/zfs-auto-snapshot/archive/master.zip
+unzip master.zip
+cd zfs-auto-snapshot-master
+make systemd
+```
 
-You can find some example `.timer` files in the `timers/` directory of this repo. They will be installed when you run `make install`.
+### Scheduling
 
-You can enable the timers as follows:
+See [systemd timers](https://wiki.archlinux.org/index.php/Systemd/Timers).
 
-```
-    wget https://github.com/gaerfield/zfs-auto-snapshot/archive/master.zip
-    unzip master.zip
-    cd zfs-auto-snapshot-master
-    make systemd
-```
+You can find some example `.timer` files in the `timers/` directory of this
+repo. They will be installed when you run `make systemd`.
 
-If you wish to edit the timers, you will find them in the `/usr/local/lib/systemd/system/` directory. Save the edited timers to `/etc/systemd/system/` directory.
+If you wish to edit the timers, you will find them in the
+`/usr/local/lib/systemd/system/` directory. Save the edited timers to
+`/etc/systemd/system/` directory to override the default timers.
 
-    ```
-    cp /lib/systemd/system/zfs-auto-snapshot-frequent.timer /usr/systemd/system/
-    cp /lib/systemd/system/zfs-auto-snapshot-frequent.service /usr/systemd/system/
+### Managing Which Pools to Snapshot
 
-Managing Which Pools to Snapshot
--------------
-By default, the script will snapshot all pools automatically, unless they have the `com.sun:auto-snapshot` property set to `false`.
+By default, the script will snapshot all pools automatically, unless they
+have the `com.sun:auto-snapshot` property set to `false`.
 
-To check the status of this property for all of your pools and datasets, run the following command:
-```
+To check the status of this property for all of your pools and datasets, run
+the following command:
+
+```sh
 sudo zfs get com.sun:auto-snapshot
 ```
 
-If you see an output like the following, then snapshots are enabled on this pool:
+If you see an output like the following, then snapshots are enabled on this
+pool:
+
 ```
 NAME     PROPERTY               VALUE                  SOURCE
 archive  com.sun:auto-snapshot  -                      -
 ```
 
 To disable snapshots on this pool, issue the following command:
-```
+
+```sh
 sudo zfs set com.sun:auto-snapshot=false archive
 ```
 
 We can check with `zfs get` again, and this time our output should look like the following. If we see this, we know that snapshots have been disabled on this pool:
+
 ```
 NAME     PROPERTY               VALUE                  SOURCE
 archive  com.sun:auto-snapshot  false                  local
 ```
 
 To disable snapshots on a single dataset, the command is very similar:
-```
+
+```sh
 sudo zfs set com.sun:auto-snapshot=false archive/dataset
 ```

timers/zfs-auto-snapshot-daily.timer

@@ -1,4 +1,4 @@
-# See systemd.timers and systemd.time manpages for details
+# See systemd.timer and systemd.time manpages for details
 [Unit]
 Description=ZFS daily snapshot timer
 

timers/zfs-auto-snapshot-frequent.timer

@@ -1,4 +1,4 @@
-# See systemd.timers and systemd.time manpages for details
+# See systemd.timer and systemd.time manpages for details
 [Unit]
 Description=ZFS frequent snapshot timer
 

timers/zfs-auto-snapshot-hourly.timer

@@ -1,4 +1,4 @@
-# See systemd.timers and systemd.time manpages for details
+# See systemd.timer and systemd.time manpages for details
 [Unit]
 Description=ZFS hourly snapshot timer
 

timers/zfs-auto-snapshot-monthly.service

@@ -1,4 +1,3 @@
-[Unit]
 Description=ZFS monthly snapshot service
 
 [Service]

timers/zfs-auto-snapshot-monthly.timer

@@ -1,4 +1,4 @@
-# See systemd.timers and systemd.time manpages for details
+# See systemd.timer and systemd.time manpages for details
 [Unit]
 Description=ZFS monthly snapshot timer
 

timers/zfs-auto-snapshot-weekly.timer

@@ -1,4 +1,3 @@
-# See systemd.timers and systemd.time manpages for details
 [Unit]
 Description=ZFS weekly snapshot timer
 

timers/zfs-auto-snapshot.target

@@ -1,3 +1,4 @@
+# See systemd.target and systemd.unit manpages for details
 [Unit]
 Description=Automatically create, rotate, and destroy periodic ZFS snapshots.
 Requires=zfs-auto-snapshot-frequent.timer