Expanded the oc completion page to include the setup steps for both Bash, and Zsh shell's

fixed an error in the zsh completion steps, the command now includes the absolute path to .zshrc file

Author: waljaber

cli_reference/openshift_cli/configuring-cli.adoc

@@ -6,5 +6,13 @@ include::_attributes/common-attributes.adoc[]
 
 toc::[]
 
-// Enabling tab completion
-include::modules/cli-configuring-completion.adoc[leveloffset=+1]
+[id="cli-enabling-tab-completion"]
+== Enabling tab completion
+
+You can enable tab completion for the Bash or Zsh shells.
+
+// Enabling tab completion for Bash
+include::modules/cli-configuring-completion.adoc[leveloffset=+2]
+
+// Enabling tab completion for Zsh
+include::modules/cli-configuring-completion-zsh.adoc[leveloffset=+2]

modules/cli-configuring-completion-zsh.adoc

@@ -0,0 +1,29 @@
+// Module included in the following assemblies:
+//
+// * cli_reference/openshift_cli/configuring-cli.adoc
+
+:_content-type: PROCEDURE
+[id="cli-enabling-tab-completion-zsh_{context}"]
+= Enabling tab completion for Zsh
+
+After you install the OpenShift CLI (`oc`), you can enable tab completion to automatically complete `oc` commands or suggest options when you press Tab. The following procedure enables tab completion for the Zsh shell.
+
+.Prerequisites
+
+* You must have the OpenShift CLI (`oc`) installed.
+
+.Procedure
+
+* To add tab completion for `oc` to your `.zshrc` file, run the following command:
++
+[source,terminal]
+----
+$ cat >>~/.zshrc<<EOF
+if [ $commands[oc] ]; then
+  source <(oc completion zsh)
+  compdef _oc oc
+fi
+EOF
+----
+
+Tab completion is enabled when you open a new terminal.

modules/cli-configuring-completion.adoc

@@ -4,35 +4,31 @@
 
 :_content-type: PROCEDURE
 [id="cli-enabling-tab-completion_{context}"]
-= Enabling tab completion
+= Enabling tab completion for Bash
 
-After you install the `oc` CLI tool, you can enable tab completion to
-automatically complete `oc` commands or suggest options when you press Tab.
+After you install the OpenShift CLI (`oc`), you can enable tab completion to automatically complete `oc` commands or suggest options when you press Tab. The following procedure enables tab completion for the Bash shell.
 
 .Prerequisites
 
-* You must have the `oc` CLI tool installed.
+* You must have the OpenShift CLI (`oc`) installed.
 * You must have the package `bash-completion` installed.
 
 .Procedure
 
-The following procedure enables tab completion for Bash.
-
-. Save the Bash completion code to a file.
+. Save the Bash completion code to a file:
 +
 [source,terminal]
 ----
 $ oc completion bash > oc_bash_completion
 ----
 
-. Copy the file to `/etc/bash_completion.d/`.
+. Copy the file to `/etc/bash_completion.d/`:
 +
 [source,terminal]
 ----
 $ sudo cp oc_bash_completion /etc/bash_completion.d/
 ----
 +
-You can also save the file to a local directory and source it from your
-`.bashrc` file instead.
+You can also save the file to a local directory and source it from your `.bashrc` file instead.
 
 Tab completion is enabled when you open a new terminal.