link windows page and add crlf to notes

Author: brownsarahm

_toc.yml

@@ -45,6 +45,7 @@ parts:
     - file: resources/gettinghelp
     - file: resources/organization
     - file: resources/more_info_on_cpus
+    - file: resources/windows
     - url: https://introcompsys.github.io/spring2022/resources/testimonials.html
       title: Advice from Spring 2022 Students
     # - file: letters/index

notes/2023-02-16.md

@@ -112,6 +112,7 @@ git status
 fatal: not a git repository (or any of the parent directories): .git
 ```
 
+## Why Documentation
 
 Today we will talk about documentation, there are several reasons this is important: 
 - **using** official documentation is the best way to get better at the tools
@@ -188,7 +189,7 @@ Your book template can be found at
 
 ```
 
-
+You can make it with any name: 
 ```
 jupyter-book create example
 ```
@@ -209,7 +210,7 @@ Your book template can be found at
 ```
 ls
 ```
-
+Each one makes a directory
 ```
 example				tiny-book
 github-in-class-brownsarahm-1
@@ -322,6 +323,27 @@ git commit -m 'init jupyterbook'
  create mode 100644 requirements.txt
 ```
 
+````{margin}
+```{note} CRLF Warning 
+
+This is GitBash telling you that git is helping.  Windows uses two characters for a new line `CR` (cariage return) and `LF` (line feed).
+Classic Mac Operating system used the `CR` character.  Unix-like systems (including MacOS X) use only the `LF` character. 
+If you try to open a file on Windows that has only `LF` characters, Windows will think it's all one line. To help you, 
+since git knows people collaborate across file systems, when you check out files from the git database (`.git/` directory)
+git replaces `LF` characters with `CRLF` before updating your working directory. 
+
+When working on Windows, when you make a file locally, each new line will have `CRLF` in it. If your collaborator
+(or server, eg GitHub) runs not a unix or linux based operating system (it almost certainly does) these extra 
+characters will make a mess and make the system interpret your code wrong. To help you out, 
+git will automatically, for Windows users, convert `CRLF` to `LF` when it adds
+your work to the index (staging area). Then when you push, it's the compatible version. 
+
+[git documentation of the feature](https://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration#Formatting-and-Whitespace) 
+this is added to a [new Windows page under resources](../resources/windows.md)
+```
+````
+
+
 
 ```
 git commit --help