fix: regex essentials correct position in menu

website/content/docs/part-4-shell-scripting/logic/_index.md

@@ -0,0 +1,3 @@
+- conditionals
+- `man test`
+- chainde commands: ```git pull && git checkout```, chained OR, OR true

website/content/docs/part-5-building-your-toolkit/configuring-the-shell/_index.md

@@ -4,3 +4,8 @@ interactive vs non interactive shells - running a shell script is a good example
 
 - Why we don't echo in config - imagine shell scripts like `common` echoing stuff out
 
+## Useful reading
+
+- https://learnbyexample.gitbooks.io/linux-command-line/content/Shell_Customization.html
+- https://www.freecodecamp.org/news/bashrc-customization-guide/
+

website/content/menu/index.md

@@ -19,11 +19,11 @@ bookMenuLevels: 1
    - [Finding Files]({{< relref "/docs/part-2-core-skills/finding-files" >}})
    - [What is a Shell?]({{< relref "/docs/part-2-core-skills/what-is-a-shell" >}})
  - [**Part 3 - Manipulating Text**]({{< relref "/docs/part-3-manipulating-text" >}})
+   - [Regex Essentials]({{< relref "/docs/part-3-manipulating-text/regex-essentials" >}})
    - [Get to Grips with Grep]({{< relref "/docs/part-3-manipulating-text/get-to-grips-with-grep" >}})
    - [Slice and Dice Text]({{< relref "/docs/part-3-manipulating-text/slice-and-dice-text" >}})
    - [Advanced Text Manipulation with Sed]({{< relref "/docs/part-3-manipulating-text/advanced-text-manipulation" >}})
    - [Build Commands on the Fly with Xargs]({{< relref "/docs/part-3-manipulating-text/build-commands-on-the-fly" >}})
-   - [Regex Essentials]({{< relref "/docs/part-3-manipulating-text/regex-essentials" >}})
  - [**Part 4 - Shell Scripting**]({{< relref "/docs/part-4-shell-scripting" >}})
    - [Shell Script Essentials]({{< relref "/docs/part-4-shell-scripting/shell-script-essentials" >}})
  - [**Work in Progress**]({{< relref "/docs/work-in-progress" >}})