updates

Author: pguerin3

README.adoc

@@ -512,11 +512,31 @@ run '~/.tmux/plugins/tpm/tpm'
 ....
 
 
+=== Terminal shell with Bash, and the GNU Readline Library
+
+Other shells have their own Readline editor. eg Zsh Line Editor (ZLE).
+The Fish shell also has it's own readline editor.
+
+Bash by default has the GNU Readline library.
+
+https://tiswww.cwru.edu/php/chet/readline/rltop.html
+
+The GNU Readline library by default has the Emacs key bindings.
+However, there is an option to use Vi key bindings instead.
+The setting for Vi key bindings is:
+
+[source, bash]
+....
+# ~/.inputrc
+set editing-mode vi
+....
+
+
 === Terminal shell with Zsh
 
 The Zsh shell is pretty plain out-of-the box but can be configured easily enough.
 
-Unlike Fish, Zsh as a vim mode so you can escape and then use the vim key 
+Unlike Fish, Zsh has a vim mode so you can escape and then use the vim key 
 bindings to help you edit a command.
 
 Install the Zsh shell (with some Zsh packages in the Fedora repo) as follows: