2.1.28, initiation update to PXT v5.28.24 (#54)

docs/reference/game/is-touching-edge.md

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+# Touching Edge
+
+Find whether the sprite is touching the edge of the [LED screen](/device/screen).
+
+Sprites are touching the edge if they overlap with an LED on the edge
+of the screen.
+
+```sig
+game.createSprite(0, 2).isTouchingEdge();
+```
+
+## Parameters
+
+* a **sprite** that might be touching the edge of the screen.
+
+## Returns
+
+* `true` if the sprite is touching the edge of the screen.
+
+## Example
+
+This program makes a sprite in the middle of the left edge of the LED screen.
+Then it says `EDGY!` if it's on the edge (which it is!), and `SAFE!` if it's
+not on the edge.
+
+```blocks
+let item = game.createSprite(0, 2);
+if (item.isTouchingEdge()) {
+    basic.showString("EDGY!");
+} else {
+    basic.showString("SAFE!");
+}
+```
+	
+## See also
+
+[create sprite](/reference/game/create-sprite),
+[is touching](/reference/game/is-touching),
+[if on edge, bounce](/reference/game/if-on-edge-bounce)