Merge pull request #256 from justwriteclick/ag-updates

Minor updates

Author: annegentle

404.md

@@ -7,7 +7,8 @@ search_omit: true
 permalink: /404.html
 ---  
 
-Sorry, but the page you were trying to find does not exist --- perhaps you can try searching for it below.
+Sorry, but the page you were trying to find does not exist. 
+Try searching for it below.
 
 <script type="text/javascript">
   var GOOG_FIXURL_LANG = 'en';

README.md

@@ -39,7 +39,7 @@ On macOS you need to install brew, bundler.io, and Ruby version manager so that
    $ echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.zshrc
    ```
 
-1. Source your `.bash_profile` file. If you are using macOS Catalina, your profile file may be `.zshrc`.
+1. Source your `.bash_profile` file. If you are using macOS Catalina or later, your profile file may be `.zshrc`.
 
    ```
    $ source ~/.bash_profile