Merge pull request #116 from ncguk/patch-1

Spelling and grammar corrections

docs/main/prerequesites.md

@@ -25,7 +25,7 @@ Pi-hole needs a static IP address to properly function (a DHCP reservation is ju
 
 As part of our install process, **we append some lines to `/etc/dhcpcd.conf` in order to statically assign an IP address**, so take note of this prior to installing.
 
-Please be aware of this fact because it [may cause confusion](https://github.com/pi-hole/pi-hole/issues/1713#issue-260746084).  This is not the ideal situation for us to be in, but since a significant portion of our users are running Pi-hole on Raspbian; and because Pi-hole's roots began with the Raspberry Pi, it's a problem that is [difficult problem to get away from](https://github.com/pi-hole/pi-hole/issues/1713#issuecomment-332317532).
+Please be aware of this fact because it [may cause confusion](https://github.com/pi-hole/pi-hole/issues/1713#issue-260746084).  This is not the ideal situation for us to be in but, since a significant portion of our users are running Pi-hole on Raspbian - and because Pi-hole's roots began with the Raspberry Pi - it's a problem that is [difficult to get away from](https://github.com/pi-hole/pi-hole/issues/1713#issuecomment-332317532).
 
 Due to the complexity of different ways of setting an IP address across different systems, it's a slow process and [we need help](https://github.com/pi-hole/pi-hole/issues/629).  If you're willing to contribute, please let us know.
 
@@ -45,11 +45,11 @@ Due to the complexity of different ways of setting an IP address across differen
 
 ### Firewalls
 
-Below are some examples of firewall rules that will need to be set on your Pi-hole server in order to use the functions available. These are only shown as guides, the actual commands used will be found with your distributions documentation.
+Below are some examples of firewall rules that will need to be set on your Pi-hole server in order to use the functions available. These are only shown as guides, the actual commands used will be found with your distribution's documentation.
 
 #### IPTables
 
-IPTables uses two sets of tables. One set is for IPv4 chains, and the second is for IPv6 chains. If only IPv4 blocking is used for the Pi-hole installation, only apply the rules for IP4Tables. Full Stack (IPv4 and IPv6) require both sets of rules to be applied. *Note: These examples insert the rules at the front of the chain. Please see your distributions documentation to see the exact proper command to use.*
+IPTables uses two sets of tables. One set is for IPv4 chains, and the second is for IPv6 chains. If only IPv4 blocking is used for the Pi-hole installation, only apply the rules for IP4Tables. Full Stack (IPv4 and IPv6) require both sets of rules to be applied. *Note: These examples insert the rules at the front of the chain. Please see your distribution's documentation for the exact proper command to use.*
 
 IPTables (IPv4)
 
@@ -68,7 +68,7 @@ ip6tables -I INPUT -p udp -m udp --sport 546:547 --dport 546:547 -j ACCEPT
 ```
 #### FirewallD
 
-Using the `--permanent` argument will ensure the firewall rules persist reboots. If only IPv4 blocking is used for the Pi-hole installation, the `dhcpv6` service can be removed the the commands below. Create a new zone for the local interface (`lo`) for the pihole-FTL ports to ensure the API is only accessible locally. Finally `--reload` to have the new firewall configuration take effect immediately.
+Using the `--permanent` argument will ensure the firewall rules persist reboots. If only IPv4 blocking is used for the Pi-hole installation, the `dhcpv6` service can be removed from the commands below. Create a new zone for the local interface (`lo`) for the pihole-FTL ports to ensure the API is only accessible locally. Finally `--reload` to have the new firewall configuration take effect immediately.
 
 ```bash
 firewall-cmd --permanent --add-service=http --add-service=dns --add-service=dhcp --add-service=dhcpv6