fixed markdown formatting in docs

doc/pages/components/grid.html

@@ -11,7 +11,7 @@ <h3 class="subheader">Create powerful multi-device layouts quickly and easily wi
 
 <h3>Basic</h3>
 
-Start by adding an element with a class of `row`. This will create a horizontal block to contain vertical columns. Then add divs with a `column` class within that row. You can use `column` or `column**s**` — the only difference is grammar. Specify the widths of each column with the small-#, medium-#, and large-# classes.
+Start by adding an element with a class of `row`. This will create a horizontal block to contain vertical columns. Then add divs with a `column` class within that row. You can use `column` or `columns` — the only difference is grammar. Specify the widths of each column with the small-#, medium-#, and large-# classes.
 
 **Foundation is mobile-first**. Code for small screens first, and larger devices will inherit those styles. Customize for larger screens as necessary.