refine wording on install instruction

Author: liufengyun

docs/_includes/getting-started.html

@@ -5,9 +5,9 @@ <h1 id="getting-started">Try Dotty</h1>
         <p>If you are a Mac user, you can install Dotty with <a href="https://brew.sh/">brew</a>:</p>
         <pre class="sourceCode bright"><code>brew install lampepfl/brew/dotty</code></pre>
 
-        <p>If you are a Linux or Windows user, download the <a href="https://github.com/lampepfl/dotty/releases">latest release</a>. Optionally add the folder path <code>bin/</code> to the system environment variable <code>PATH</code>. </p>
+        <p>If you are a Linux or Windows user, download the <a href="https://github.com/lampepfl/dotty/releases">latest release</a>. Optionally add path of the folder <code>bin/</code> to the system environment variable <code>PATH</code>. </p>
 
-        <p>Now you can compile the Scala source code:<p>
+        <p>Now you can compile Scala source code:<p>
         <pre class="sourceCode bright"><code>dotc hello.scala</code></pre>
 
         <p>To start the RPEL, run: <code>dotr</code><p>