waveshare2in13v2: List width first in String() result

The convention is to write dimensions with the width first.

waveshare2in13v2/waveshare213v2.go

@@ -281,7 +281,9 @@ func (d *Dev) Halt() error {
 
 // String returns a string containing configuration information.
 func (d *Dev) String() string {
-	return fmt.Sprintf("epd.Dev{%s, %s, Height: %d, Width: %d}", d.c, d.dc, d.opts.Height, d.opts.Width)
+	bounds := d.Bounds()
+
+	return fmt.Sprintf("epd.Dev{%s, %s, Width: %d, Height: %d}", d.c, d.dc, bounds.Dx(), bounds.Dy())
 }
 
 // Sleep makes the controller enter deep sleep mode. It can be woken up by

waveshare2in13v2/waveshare213v2_test.go

@@ -25,14 +25,14 @@ func TestNew(t *testing.T) {
 	}{
 		{
 			name:       "empty",
-			wantString: "epd.Dev{playback, (0), Height: 0, Width: 0}",
+			wantString: "epd.Dev{playback, (0), Width: 0, Height: 0}",
 		},
 		{
 			name:             "EPD2in13v2",
 			opts:             EPD2in13v2,
 			wantBounds:       image.Rect(0, 0, 122, 250),
 			wantBufferBounds: image.Rect(0, 0, 128, 250),
-			wantString:       "epd.Dev{playback, (0), Height: 250, Width: 122}",
+			wantString:       "epd.Dev{playback, (0), Width: 122, Height: 250}",
 		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {