Merge pull request #728 from jongleur1983/addToStringToBgr24

Add ToString implementations to Bgr24 and Bgra32

src/ImageSharp/PixelFormats/Bgr24.cs

@@ -197,5 +197,11 @@ namespace SixLabors.ImageSharp.PixelFormats
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void ToRgba64(ref Rgba64 dest) => dest.PackFromScaledVector4(this.ToScaledVector4());
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return $"({this.B},{this.G},{this.R})";
+        }
     }
 }

src/ImageSharp/PixelFormats/Bgra32.cs

@@ -280,5 +280,11 @@ namespace SixLabors.ImageSharp.PixelFormats
             this.B = (byte)vector.Z;
             this.A = (byte)vector.W;
         }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return $"({this.B},{this.G},{this.R},{this.A})";
+        }
     }
 }