Add some inline links to "previous examples"

Fixes #144.

examples/mutexes/mutexes.go

@@ -1,6 +1,6 @@
 // In the previous example we saw how to manage simple
-// counter state using atomic operations. For more complex
+// counter state using [atomic operations](atomic-counters).
-// state we can use a _[mutex](http://en.wikipedia.org/wiki/Mutual_exclusion)_
+// For more complex state we can use a _[mutex](http://en.wikipedia.org/wiki/Mutual_exclusion)_
 // to safely access data across multiple goroutines.
 
 package main

examples/mutexes/mutexes.hash

@@ -1,2 +1,2 @@
-a42e6b574ab2c2bdd38df53d77b9a2f3f3e0b10c
+3ce8467418aa740ea6c930afac3985a943c76311
--_LKNceBru
+kZrod-Rkos

examples/stateful-goroutines/stateful-goroutines.go

@@ -1,6 +1,6 @@
 // In the previous example we used explicit locking with
-// mutexes to synchronize access to shared state across
+// [mutexes](mutexes) to synchronize access to shared state
-// multiple goroutines. Another option is to use the
+// across multiple goroutines. Another option is to use the
 // built-in synchronization features of  goroutines and
 // channels to achieve the same result. This channel-based
 // approach aligns with Go's ideas of sharing memory by

examples/stateful-goroutines/stateful-goroutines.hash

@@ -1,2 +1,2 @@
-9b7362872b9984296fd919441c2b6928ae0d70c1
+603a70a77ed18db9da4f8c7911a92b87fd21400c
-qHTT2jOKkS
+-WqmiTr6ek

public/mutexes

@@ -26,8 +26,8 @@
         <tr>
           <td class="docs">
             <p>In the previous example we saw how to manage simple
-counter state using atomic operations. For more complex
+counter state using <a href="atomic-counters">atomic operations</a>.
-state we can use a <em><a href="http://en.wikipedia.org/wiki/Mutual_exclusion">mutex</a></em>
+For more complex state we can use a <em><a href="http://en.wikipedia.org/wiki/Mutual_exclusion">mutex</a></em>
 to safely access data across multiple goroutines.</p>
 
           </td>
@@ -42,7 +42,7 @@ to safely access data across multiple goroutines.</p>
             
           </td>
           <td class="code leading">
-	        <a href="http://play.golang.org/p/-_LKNceBru"><img title="Run code" src="play.png" class="run" /></a>
+	        <a href="http://play.golang.org/p/kZrod-Rkos"><img title="Run code" src="play.png" class="run" /></a>
             <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
 </pre></div>
 

public/stateful-goroutines

@@ -26,8 +26,8 @@
         <tr>
           <td class="docs">
             <p>In the previous example we used explicit locking with
-mutexes to synchronize access to shared state across
+<a href="mutexes">mutexes</a> to synchronize access to shared state
-multiple goroutines. Another option is to use the
+across multiple goroutines. Another option is to use the
 built-in synchronization features of  goroutines and
 channels to achieve the same result. This channel-based
 approach aligns with Go&rsquo;s ideas of sharing memory by
@@ -46,7 +46,7 @@ by exactly 1 goroutine.</p>
             
           </td>
           <td class="code leading">
-	        <a href="http://play.golang.org/p/qHTT2jOKkS"><img title="Run code" src="play.png" class="run" /></a>
+	        <a href="http://play.golang.org/p/-WqmiTr6ek"><img title="Run code" src="play.png" class="run" /></a>
             <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
 </pre></div>