docs: use simpler language for row- and column-reverse descriptions (mdn#8762)

danieldafoe · web-flow · commit b0afdd188dbf · 2021-09-09T09:37:11.000+01:00
The word "permuted" was being used. This tripped me up so much while reading that I had to stop and open this PR.

This is not very approachable language. It's not a commonly used word, so let's try to improve the reading level for these descriptions. 

Open to suggestions or improvements for my proposed change! 🙂
diff --git a/files/en-us/web/css/flex-direction/index.md b/files/en-us/web/css/flex-direction/index.md
@@ -46,11 +46,11 @@ The following values are accepted:
 - `row`
   - : The flex container's main-axis is defined to be the same as the text direction. The **main-start** and **main-end** points are the same as the content direction.
 - `row-reverse`
-  - : Behaves the same as `row` but the **main-start** and **main-end** points are permuted.
+  - : Behaves the same as `row` but the **main-start** and **main-end** points are opposite to the content direction.
 - `column`
   - : The flex container's main-axis is the same as the block-axis. The **main-start** and **main-end** points are the same as the **before** and **after** points of the writing-mode.
 - `column-reverse`
-  - : Behaves the same as `column` but the **main-start** and **main-end** are permuted.
+  - : Behaves the same as `column` but the **main-start** and **main-end** are opposite to the content direction.
 
 ## Accessibility concerns
 
