Update /en-US/install.html to aid readability

en-US/install.html

@@ -138,12 +138,12 @@ <h3>Configuring the <code>PATH</code> environment variable</h3>
           Accordingly, it is customary for Rust developers to include this
           directory in their
           <a href="https://en.wikipedia.org/wiki/PATH_(variable)"><code>PATH</code>
-          environment variable</a>.  During installation, <code>rustup</code>,
-          will attempt to configure
-          <code>PATH</code>, but because of differences between platforms,
+          environment variable</a>.  During installation <code>rustup</code>
+          will attempt to configure the
+          <code>PATH</code>. Because of differences between platforms,
           command shells, and bugs in <code>rustup</code>, the modifications
           to <code>PATH</code> may not take effect until the console is
-          restarted, or the user logged out, or may not succeed at all.
+          restarted, or the user is logged out, or it may not succeed at all.
         </p>
 
         <p>
@@ -187,8 +187,8 @@ <h2>Other installation methods</h2>
       <div class="col-md-12">
         <p>
           The installation described above, via
-          <code>rustup</code>, is the preferred way to install Rust for most developers,
-          but Rust can be
+          <code>rustup</code>, is the preferred way to install Rust for most developers.
+          However, Rust can be
           <a href="other-installers.html">installed via other methods</a>
           as well.
         </p>