Fixed typos in code examples.

Author: sjrd

_includes/bullet-concurrency-distribution.html

@@ -2,13 +2,13 @@
   <figcaption>Concurrent/Distributed</figcaption>
   <pre><code>val x = future { someExpensiveComputation() }
 val y = future { someOtherExpensiveComputation() }
-val z = for (a <- x; b <- y) yield a*b
-for (c <- z) println("Result: " + c)
+val z = for (a &lt;- x; b &lt;- y) yield a*b
+for (c &lt;- z) println("Result: " + c)
 println("Meanwhile, the main thread goes on!")</code></pre>
 </figure>
 
 <div class="snippet-explanation">
-  <h3>Go Concurrent or Distributed with Futures & Promises</h3>
+  <h3>Go Concurrent or Distributed with Futures &amp; Promises</h3>
 <p>In Scala, futures and promises can be used to process data <i>asynchronously</i>, making it easier to parallelize or even distribute your application.</p>
 <p>
 In this example, the <code>future{}</code> construct evaluates its argument asynchronously, and returns

_includes/bullet-java-interop.html

@@ -47,8 +47,8 @@ <h3>Combine Scala and Java seamlessly</h3>
 their methods and inherit from Java classes transparently from Scala.
 Similarly, Java code can reference Scala classes and objects.</p>
 <p>
-In this example, the scala class <code>Author</code> implements the Java
-interface <code>Comparable&lt;T&gt;</code> and work with Java
+In this example, the Scala class <code>Author</code> implements the Java
+interface <code>Comparable&lt;T&gt;</code> and works with Java
 <code>File</code>s. The Java code uses a method from the companion object
 <code>Author</code>, and accesses fields of the <code>Author</code> class.
 It also uses <code>JavaConversions</code> to convert between Scala collections

_includes/bullet-pattern-matching.html

@@ -15,7 +15,7 @@
 <div class="snippet-explanation">
   <h3>Switch on the structure of your data</h3>
 <p>In Scala, <em>case classes</em> are used to represent structural data
-types. The implicitly equip the class with meaningful <code>toString</code>,
+types. They implicitly equip the class with meaningful <code>toString</code>,
 <code>equals</code> and <code>hashCode</code> methods, as well as the
 ability to be deconstructed with <em>pattern matching</em>.</p>
 <p>

_includes/bullet-traits.html

@@ -10,7 +10,7 @@
 }
 trait CommandoBridge extends Spacecraft {
   def engage(): Unit = {
-    for (_ <- 1 to 3)
+    for (_ &lt;- 1 to 3)
       speedUp()
   }
   def speedUp(): Unit
@@ -31,7 +31,7 @@
 </figure>
 
 <div class="snippet-explanation">
-  <h3>Flexibly Combine Interface & Behavior</h3>
+  <h3>Flexibly Combine Interface &amp; Behavior</h3>
   <p>
 In Scala, <i>multiple traits</i> can be mixed into a class to combine their interface and their
 behavior.</p>