docs(usage): proofread copy and fix capitalization

Author: trollixx

usage.html

@@ -5,10 +5,10 @@
 ---
 <div class="zd-section">
   <h2 id="download-docsets">Download Docsets</h2>
-  <p>After installing Zeal go to <kbd>Tools</kbd> ⟶ <kbd>Docsets</kbd> to browse and download docsets.</p>
+  <p>After installing Zeal, go to <kbd>Tools</kbd> ⟶ <kbd>Docsets</kbd> to browse and download docsets.</p>
 
   <h2>Search Filters</h2>
-  <p>You can limit search results to a specific (or a set of specific) docsets.</p>
+  <p>You can limit search results to a specific docset, or a set of docsets.</p>
   <p>The docset filter and the search query are delimited by a colon character (<code>:</code>).</p>
   <p>Examples:</p>
   <ul>
@@ -33,7 +33,7 @@ <h2 id="shortcuts">Keyboard Shortcuts</h2>
         <td><kbd>Ctrl+K</kbd> or <kbd>Ctrl+L</kbd></td>
       </tr>
       <tr>
-        <td>Find in page</td>
+        <td>Find in Page</td>
         <td><kbd>Ctrl+F</kbd> or <kbd>/</kbd></td>
       </tr>
       <tr>
@@ -69,7 +69,7 @@ <h2 id="shortcuts">Keyboard Shortcuts</h2>
         <td><kbd>Ctrl+0</kbd></td>
       </tr>
       <tr>
-        <td>Hide/show Sidebar</td>
+        <td>Hide/Show Sidebar</td>
         <td><kbd>Ctrl+B</kbd></td>
       </tr>
       <tr>
@@ -98,7 +98,7 @@ <h3>IntelliJ IDEA</h3>
     There is an IDEA plugin available at <a href="https://plugins.jetbrains.com/plugin/7351?pr=idea">https://plugins.jetbrains.com/plugin/7351?pr=idea</a>.
   </p>
 
-  <h3>KTextEditor (Kate, KWrite, KDevelop, Kile, etc)</h3>
+  <h3>KTextEditor (Kate, KWrite, KDevelop, Kile, etc.)</h3>
 
   <p>
     A plugin for KTextEditor-based editors is available at <a href="https://github.com/g3ar/ZealSearch">https://github.com/g3ar/ZealSearch</a>.
@@ -110,7 +110,7 @@ <h3>Sublime Text</h3>
     There is a Sublime Text 2/3 package available at <a href="https://github.com/vaanwd/Zeal">https://github.com/vaanwd/Zeal</a>.
   </p>
 
-  <h3>VIM</h3>
+  <h3>Vim</h3>
 
   <p>
     There is a Vim plugin available at <a href="https://github.com/KabbAmine/zeavim.vim">https://github.com/KabbAmine/zeavim.vim</a>.