fix curly quotes in form_button example
diff --git a/user_guide/helpers/form_helper.html b/user_guide/helpers/form_helper.html
index 77fe598..3240684 100644
--- a/user_guide/helpers/form_helper.html
+++ b/user_guide/helpers/form_helper.html
@@ -346,7 +346,7 @@
 

 <p>Lets you generate a standard button element. You can minimally pass the button name and content in the first and second parameter:</p>

 <code>

-echo form_button(’name’,’content’);<br />

+echo form_button('name','content');<br />

 <br />

 // Would produce<br />

 &lt;button name="name" type="submit"&gt;Content&lt;/button&gt;

@@ -355,11 +355,11 @@
 Or you can pass an associative array containing any data you wish your form to contain:

 <code>

 $data = array(<br />

-&nbsp;&nbsp;&nbsp;&nbsp;‘name’ => ‘button’,<br />

-&nbsp;&nbsp;&nbsp;&nbsp;‘id’ => ‘button’,<br />

-&nbsp;&nbsp;&nbsp;&nbsp;‘value’ => ‘true’,<br />

-&nbsp;&nbsp;&nbsp;&nbsp;‘type’ => ‘reset’,<br />

-&nbsp;&nbsp;&nbsp;&nbsp;‘content’ => ‘Reset’<br />

+&nbsp;&nbsp;&nbsp;&nbsp;'name' => 'button',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;'id' => 'button',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;'value' => 'true',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;'type' => 'reset',<br />

+&nbsp;&nbsp;&nbsp;&nbsp;'content' => 'Reset'<br />

 );<br />

 <br />

 echo form_button($data);<br />

@@ -370,8 +370,8 @@
 

 If you would like your form to contain some additional data, like JavaScript, you can pass it as a string in the third parameter:

 <code>

-$js = ‘onClick="some_function()"’;<br /><br />

-echo form_button(’mybutton’, ‘Click Me’, $js);

+$js = 'onClick="some_function()"';<br /><br />

+echo form_button('mybutton', 'Click Me', $js);

 </code>