updating typos in download and spacing docs

Author: George Treviranus

docs/download.md

@@ -14,7 +14,7 @@ Going this route allows for far more customization, but do so at your own risk.
 - SCSS: [Download](https://github.com/geotrev/undernet/raw/master/dist/undernet.scss.zip)
 - JS: [Download](https://github.com/geotrev/undernet/raw/master/dist/undernet.modules.js.zip)
 
-You can also install with npm or yarn. See the [JavaScript](/docs/overview/javascript) articles for more details.
+You can also install with npm or yarn. See the [JavaScript](/docs/overview/javascript) article for more details.
 
 ```shell
 $ npm install undernet

docs/spacing.md

@@ -35,7 +35,7 @@ If the default value of `$global-space` isn't the right size, don't worry, there
 
 ### Custom Sizes With Sides
 
-Define a spacing size with a side, e.g. `has-padding-X-Y`, where `X` is the side and `Y` is the side.
+Define a spacing size with a side, e.g. `has-padding-X-Y`, where `X` is the side and `Y` is the size.
 
 <div class="filler-bg has-padding-left-1 has-no-padding-top has-no-padding-right has-no-padding-bottom">
   .has-padding-left-1