image: spell coordinate consistently, without the hyphen.

Change-Id: I211c0d33dc292c6a703d788f6d4d286107bcb6b0
Reviewed-on: https://go-review.googlesource.com/8906Reviewed-by: Rob Pike <r@golang.org>

src/image/draw/clip_test.go

@@ -185,17 +185,17 @@ func TestClip(t *testing.T) {
 		}
 
 		// Check that the clipped rectangle is contained by the dst / src / mask
-		// rectangles, in their respective co-ordinate spaces.
+		// rectangles, in their respective coordinate spaces.
 		if !r.In(c.dr) {
 			t.Errorf("%s: c.dr %v does not contain r %v", c.desc, c.dr, r)
 		}
-		// sr is r translated into src's co-ordinate space.
+		// sr is r translated into src's coordinate space.
 		sr := r.Add(c.sp.Sub(c.dr.Min))
 		if !sr.In(c.sr) {
 			t.Errorf("%s: c.sr %v does not contain sr %v", c.desc, c.sr, sr)
 		}
 		if !c.nilMask {
-			// mr is r translated into mask's co-ordinate space.
+			// mr is r translated into mask's coordinate space.
 			mr := r.Add(c.mp.Sub(c.dr.Min))
 			if !mr.In(c.mr) {
 				t.Errorf("%s: c.mr %v does not contain mr %v", c.desc, c.mr, mr)

src/image/draw/draw.go

@@ -68,7 +68,7 @@ func (floydSteinberg) Draw(dst Image, r image.Rectangle, src image.Image, sp ima
 }
 
 // clip clips r against each image's bounds (after translating into the
-// destination image's co-ordinate space) and shifts the points sp and mp by
+// destination image's coordinate space) and shifts the points sp and mp by
 // the same amount as the change in r.Min.
 func clip(dst Image, r *image.Rectangle, src image.Image, sp *image.Point, mask image.Image, mp *image.Point) {
 	orig := r.Min
@@ -336,9 +336,11 @@ func drawCopySrc(dst *image.RGBA, r image.Rectangle, src *image.RGBA, sp image.P
 		ddelta = dst.Stride
 		sdelta = src.Stride
 	} else {
-		// If the source start point is higher than the destination start point, then we compose the rows
-		// in bottom-up order instead of top-down. Unlike the drawCopyOver function, we don't have to
-		// check the x co-ordinates because the built-in copy function can handle overlapping slices.
+		// If the source start point is higher than the destination start
+		// point, then we compose the rows in bottom-up order instead of
+		// top-down. Unlike the drawCopyOver function, we don't have to check
+		// the x coordinates because the built-in copy function can handle
+		// overlapping slices.
 		d0 += (dy - 1) * dst.Stride
 		s0 += (dy - 1) * src.Stride
 		ddelta = -dst.Stride

src/image/internal/imageutil/gen.go

@@ -54,7 +54,7 @@ import (
 // successful. If it returns false, no dst pixels were changed.
 //
 // This function assumes that r is entirely within dst's bounds and the
-// translation of r from dst co-ordinate space to src co-ordinate space is
+// translation of r from dst coordinate space to src coordinate space is
 // entirely within src's bounds.
 func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Point) (ok bool) {
 	// This function exists in the image/internal/imageutil package because it

src/image/internal/imageutil/impl.go

@@ -11,7 +11,7 @@ import (
 // successful. If it returns false, no dst pixels were changed.
 //
 // This function assumes that r is entirely within dst's bounds and the
-// translation of r from dst co-ordinate space to src co-ordinate space is
+// translation of r from dst coordinate space to src coordinate space is
 // entirely within src's bounds.
 func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Point) (ok bool) {
 	// This function exists in the image/internal/imageutil package because it