Fix formatting in documentation

Removed trailing whitespaces and extra newlines. Added some missing
punctuation. Replaced unicode characters that aren't commonly used
with the more common character.

The replaced unicode characters are
- ’ (U+2019) to ' (U+0027)
- “ (U+201C) to " (U+0022)
- ” (U+201D) to " (U+0022)

docs/icons.md

@@ -58,7 +58,7 @@ Font-Awesome has a wide variety of free icons, but you can also use their pro ic
 ---
 
 ## Simple Icons
-[SimpleIcons.org](https://simpleicons.org/) is a collection of 2000+ high quality, free and open source brand and logo SVG icons. Usage of which is very similar to font-awesome icons. First find the glyph you want to use on the [website](https://simpleicons.org/), then just set your icon the the simple icon slug, prefixed with `si-`. 
+[SimpleIcons.org](https://simpleicons.org/) is a collection of 2000+ high quality, free and open source brand and logo SVG icons. Usage of which is very similar to font-awesome icons. First find the glyph you want to use on the [website](https://simpleicons.org/), then just set your icon the the simple icon slug, prefixed with `si-`.
 
 <p align="center">
   <img width="580" src="https://i.ibb.co/MVhkXfC/simple-icons-example.png" />
@@ -136,11 +136,11 @@ sections:
 - name: Material Design Icons Example
   items:
   - title: Alien Icon
-    icon: mdi-alien 
+    icon: mdi-alien
   - title: Fire Icon
-    icon: mdi-fire 
+    icon: mdi-fire
   - title: Dino Icon
-    icon: mdi-google-downasaur 
+    icon: mdi-google-downasaur
 ```
 
 <p align="center">