Editorial: fix a couple punctuation typos in "Remapping" (#91)

index.html

@@ -515,12 +515,12 @@ <h2><dfn data-lt="Standard Gamepad layout">Remapping</dfn></h2>
 
         <p>
             The "Standard Gamepad" physical button locations are layed out in
-            a left cluster of four buttons, a right cluster of four buttons
-            , a center cluster of three buttons, and a pair of front facing
+            a left cluster of four buttons, a right cluster of four buttons,
+            a center cluster of three buttons, and a pair of front facing
             buttons on the left and right side of the gamepad.  The four axes
             of the "Standard Gamepad" are associated with a pair of analog
             sticks, one on the left and one on the right.  The following
-            table describes the buttons/axes and their physical locations
+            table describes the buttons/axes and their physical locations.
         </p>
         <table class="tg">
             <thead>