typo: arbetrary -> arbitrary

examples/grid/LayoutGrids.html

@@ -417,7 +417,7 @@ <h2>Other Features</h2>
       <dt>Whether focus can wrap to the first row in the next column or the last row in the previous column when <kbd>Down Arrow</kbd> and <kbd>Up Arrow</kbd> are pressed:</dt>
       <dd>
         The only condition where this wrapping is appropriate is when every cell in the grid belongs to a single logical set.
-        In other words, if presentation of all elements in a single row is logically equivalent to presenting the same elements in an arbetrary number of rows and columns,
+        In other words, if presentation of all elements in a single row is logically equivalent to presenting the same elements in an arbitrary number of rows and columns,
         then it is appropriate for <kbd>Down Arrow</kbd> and <kbd>Up Arrow</kbd> to behave as if all cells are in a single column.
         For instance, in example 1, all cells contain a navigation link.
         That set of six links could be presented in a single row, a single column, or divided into two rows of three or three rows of two; all these  presentations would be logically equivalent.
@@ -450,7 +450,7 @@ <h2 id="kbd_label">Keyboard Support</h2>
     <p>
       <strong>NOTE:</strong> The following table describes keyboard commands that move focus among grid cells.
       In the examples on this page, some cells contain a single focusable widget, and if a cell contains a widget, the cell is not focusable; the widget receives focus instead of the cell.
-      So, when a description says a command moves focus to a cell, the command may either focus the cell or a widget inside the cell.     
+      So, when a description says a command moves focus to a cell, the command may either focus the cell or a widget inside the cell.
     </p>
     <table aria-labelledby="kbd_label" class="def">
       <thead>