Merge pull request #8305 from kalexand-rh/BZ1555379

bug 1555379 fixing informal language

Author: kalexand-rh

install_config/install/prerequisites.adoc

@@ -472,7 +472,7 @@ services.
 [NOTE]
 ====
 While iptables is the default firewall, firewalld is recommended for new
-installations. See the xref:../../admin_guide/iptables.adoc#overview[iptables section of the Cluster administration guide] for more information. 
+installations. See the xref:../../admin_guide/iptables.adoc#overview[iptables section of the Cluster administration guide] for more information.
 ====
 
 Ensure the following ports required by {product-title} are open on your network
@@ -815,10 +815,10 @@ In AWS, situations that require overriding the variables include:
 a|The user is installing in a VPC that is not configured for both `*DNS hostnames*` and `*DNS resolution*`.
 
 |`*ip*`
-a|Possibly if they have multiple network interfaces configured and they want to
-use one other than the default. You must first set
-`*openshift_set_node_ip*` to `True`. Otherwise, the SDN would attempt to
-use the `*hostname*` setting or try to resolve the host name for the IP.
+a|You have multiple network interfaces configured and want to
+use one other than the default. You must also set the
+`*openshift_set_node_ip*` parameter to `True`, or the SDN attempts to
+use the `*hostname*` setting or tries to resolve the host name for the IP address.
 
 |`*public_hostname*`
 a| - A master instance where the VPC subnet is not configured for `*Auto-assign