Fixed grammar and titles

According to doc review and style guide, minor fixes in grammar and
style.
Also, adjusted subtitle level to be in synch with the other sub-chapters.

Author: chabowski

adoc/SAP-EIC-Metallb.adoc

@@ -1,4 +1,4 @@
-== Installing and configuring of {metallb}
+== Installing and configuring {metallb}
 
 There are multiple ways to install the {metallb} software. In this guide, we will cover how to install {metallb} using `kubectl` or Helm.
 A complete overview and more details about {metallb} can be found on the 
@@ -7,13 +7,14 @@ link:https://metallb.universe.tf/[official website for {metallb}].
 === Prerequisites
 
 Before starting the installation, ensure that all requirements are met. In particular, you should pay attention to network addon compatibility.
-If you are trying to run {metallb} on a cloud platform, you should also look at the cloud compatibility page and make sure your cloud platform works with {metallb} (note that most cloud platforms do *not*).
+If you are trying to run {metallb} on a cloud platform, you should also look at the cloud compatibility page 
+and make sure your cloud platform works with {metallb} (note that most cloud platforms do *not*).
 
 There are several ways to deploy {metallb}. In this guide, we will describe how to use the {rac} to deploy {metallb}.
 
 Make sure to have one IP address available for configuring {metallb}.
 
-Before you can deploy {metallb} from {rac}, you need to create the namespace and an ImagePullSecret.
+Before you can deploy {metallb} from {rac}, you need to create the namespace and an imagePullSecret.
 To create the related namespace, run:
 ----
 $ kubectl create namespace metallb
@@ -22,16 +23,14 @@ $ kubectl create namespace metallb
 [#metalIPS]
 Instructions how to create the *imagePullSecret* can be found in <<imagePullSecret>>.
 
-++++
-<?pdfpagebreak?>
-++++
 
-=== Installation of {metallb}
+=== Installing {metallb}
 
 [#metalLIR]
-Before you can install the application, you need to login into the registry. You can find the instruction in <<LoginApplicationCollection>>.
+Before you can install the application, you need to log in to the registry. 
+You can find the instructions in <<LoginApplicationCollection>>.
 
-Create a values.yaml file with the following configuration:
+Create a _values.yaml_ file with the following configuration:
 
 [source,yaml]
 ----
@@ -48,11 +47,8 @@ $ helm install metallb oci://dp.apps.rancher.io/charts/metallb \
 --version 0.14.7
 ----
 
-++++
-<?pdfpagebreak?>
-++++
 
-== Configuring {metallb}
+=== Configuring {metallb}
 
 {metallb} needs two configurations to function properly:
 
@@ -74,7 +70,7 @@ spec:
 EOF
 ----
 
-and the layer 2 network advertisement:
+Create the layer 2 network advertisement:
 [source,bash]
 ----
 $ cat <<EOF > l2advertisement.yaml