fixed some typos and missing tags

Author: praveenpuglia

README.md

@@ -8,7 +8,7 @@ Helpful Sublime Text snippets to get you started with GitHub flavored Markdown b
 ### Via Package Control
 The easiest way is to install it via [Package Control](https://packagecontrol.io/).
 
-- Go to **Command Palette** 
+- Go to **Command Palette** `Ctrl + Shift + P` or `⌘ + Shift + P`
 - Select **Package Control : Install Package**
 - Search for **Github Markdown Snippets**
 

index.html

@@ -21,7 +21,7 @@ <h2>Installation</h2>
                 <p>
                     Easiest way to install is via <strong>Package Control</strong>.
                     <ul>
-                        <li>Go to <strong>Command Palette</strong>(<kbd>CTRL + </kbd> <kbd>SHIFT </kbd>+<kbd> P</kbd> OR <kbd>CMD + SHIFT + P</kbd>)</li>
+                        <li>Go to <strong>Command Palette</strong>(<code>Ctrl + Shift + P</code> OR <code>Cmd + Shift + P</code>)</li>
                         <li>Select <strong>Package Control : Install Package</strong></li>
                         <li>Search for <strong>Github Markdown Snippets</strong></li>
                     </ul>
@@ -38,7 +38,7 @@ <h2>Usage</h2>
                 <table class="table table-hover table-bordered">
                     <thead>
                         <tr>
-                            <th><kbd>TAB</kbd> Trigger</th>
+                            <th><code>Tab</code> Trigger</th>
                             <th>Markdown Equivalent</th>
                             <th>Output</th>
                         </tr>