diff --git a/ebitenutil/internal/assets/textrgba.go b/ebitenutil/internal/assets/textrgba.go
index 6c6934c81..6207d078b 100644
--- a/ebitenutil/internal/assets/textrgba.go
+++ b/ebitenutil/internal/assets/textrgba.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package assets
diff --git a/examples/resources/audio/classic.go b/examples/resources/audio/classic.go
index 845876318..16d976b9e 100644
--- a/examples/resources/audio/classic.go
+++ b/examples/resources/audio/classic.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package audio
diff --git a/examples/resources/audio/jab.go b/examples/resources/audio/jab.go
index f9622a801..a073aa90b 100644
--- a/examples/resources/audio/jab.go
+++ b/examples/resources/audio/jab.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package audio
diff --git a/examples/resources/audio/jump.go b/examples/resources/audio/jump.go
index 68afe0174..06119dec2 100644
--- a/examples/resources/audio/jump.go
+++ b/examples/resources/audio/jump.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package audio
diff --git a/examples/resources/fonts/arcaden.go b/examples/resources/fonts/arcaden.go
index d3969fc9e..40caca41c 100644
--- a/examples/resources/fonts/arcaden.go
+++ b/examples/resources/fonts/arcaden.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package fonts
diff --git a/examples/resources/fonts/mplus1pregular.go b/examples/resources/fonts/mplus1pregular.go
index f1dc93fb9..efa72a944 100644
--- a/examples/resources/fonts/mplus1pregular.go
+++ b/examples/resources/fonts/mplus1pregular.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package fonts
diff --git a/examples/resources/images/blocks/background.go b/examples/resources/images/blocks/background.go
index 5e73e8c80..69ab4c69c 100644
--- a/examples/resources/images/blocks/background.go
+++ b/examples/resources/images/blocks/background.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package blocks
diff --git a/examples/resources/images/blocks/blocks.go b/examples/resources/images/blocks/blocks.go
index 4c986b310..735f31b5b 100644
--- a/examples/resources/images/blocks/blocks.go
+++ b/examples/resources/images/blocks/blocks.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package blocks
diff --git a/examples/resources/images/ebiten.go b/examples/resources/images/ebiten.go
index 496d04191..239d1af26 100644
--- a/examples/resources/images/ebiten.go
+++ b/examples/resources/images/ebiten.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/examples/resources/images/fiveyears.go b/examples/resources/images/fiveyears.go
index 33075ed7f..e28dc38c0 100644
--- a/examples/resources/images/fiveyears.go
+++ b/examples/resources/images/fiveyears.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/examples/resources/images/flappy/gopher.go b/examples/resources/images/flappy/gopher.go
index 8185144a8..0ae4581b5 100644
--- a/examples/resources/images/flappy/gopher.go
+++ b/examples/resources/images/flappy/gopher.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package flappy
diff --git a/examples/resources/images/flappy/tiles.go b/examples/resources/images/flappy/tiles.go
index 07e6a723b..d3038c255 100644
--- a/examples/resources/images/flappy/tiles.go
+++ b/examples/resources/images/flappy/tiles.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package flappy
diff --git a/examples/resources/images/gophers.go b/examples/resources/images/gophers.go
index a4f326e83..97961450c 100644
--- a/examples/resources/images/gophers.go
+++ b/examples/resources/images/gophers.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/examples/resources/images/keyboard/keyboard.go b/examples/resources/images/keyboard/keyboard.go
index 4c0023d38..43966cac2 100644
--- a/examples/resources/images/keyboard/keyboard.go
+++ b/examples/resources/images/keyboard/keyboard.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package keyboard
diff --git a/examples/resources/images/platformer/background.go b/examples/resources/images/platformer/background.go
index bf0f23d4c..3435b3f7d 100644
--- a/examples/resources/images/platformer/background.go
+++ b/examples/resources/images/platformer/background.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package platformer
diff --git a/examples/resources/images/platformer/left.go b/examples/resources/images/platformer/left.go
index 9445699e3..afed05fdb 100644
--- a/examples/resources/images/platformer/left.go
+++ b/examples/resources/images/platformer/left.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package platformer
diff --git a/examples/resources/images/platformer/mainchar.go b/examples/resources/images/platformer/mainchar.go
index edf2eb06c..66ee5e8e6 100644
--- a/examples/resources/images/platformer/mainchar.go
+++ b/examples/resources/images/platformer/mainchar.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package platformer
diff --git a/examples/resources/images/platformer/right.go b/examples/resources/images/platformer/right.go
index d5545e849..86ca2e588 100644
--- a/examples/resources/images/platformer/right.go
+++ b/examples/resources/images/platformer/right.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package platformer
diff --git a/examples/resources/images/tile.go b/examples/resources/images/tile.go
index f7d5df89f..4e1f8a481 100644
--- a/examples/resources/images/tile.go
+++ b/examples/resources/images/tile.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/examples/resources/images/tiles.go b/examples/resources/images/tiles.go
index 7c1a8e97f..5ef2580b5 100644
--- a/examples/resources/images/tiles.go
+++ b/examples/resources/images/tiles.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/examples/resources/images/ui.go b/examples/resources/images/ui.go
index 742609312..ef39d3917 100644
--- a/examples/resources/images/ui.go
+++ b/examples/resources/images/ui.go
@@ -1,4 +1,4 @@
-// Code generated by file2byteslice. DO NOT EDIT
+// Code generated by file2byteslice. DO NOT EDIT.
 // (gofmt is fine after generating)
 
 package images
diff --git a/genkeys.go b/genkeys.go
index 7d045df6b..8a6cc370f 100644
--- a/genkeys.go
+++ b/genkeys.go
@@ -347,7 +347,7 @@ func main() {
 	}
 
 	// Follow the standard comment rule (https://golang.org/s/generatedcode).
-	doNotEdit := "// Code generated by genkeys.go using 'go generate'. DO NOT EDIT"
+	doNotEdit := "// Code generated by genkeys.go using 'go generate'. DO NOT EDIT."
 
 	namesSet := map[string]struct{}{}
 	namesWithoutModsSet := map[string]struct{}{}
diff --git a/internal/input/keys.go b/internal/input/keys.go
index 659858f73..a9b15d4ca 100644
--- a/internal/input/keys.go
+++ b/internal/input/keys.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Code generated by genkeys.go using 'go generate'. DO NOT EDIT
+// Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
 package input
 
diff --git a/internal/input/keys_glfw.go b/internal/input/keys_glfw.go
index de7d24b41..e41ae4182 100644
--- a/internal/input/keys_glfw.go
+++ b/internal/input/keys_glfw.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Code generated by genkeys.go using 'go generate'. DO NOT EDIT
+// Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
 // +build darwin freebsd linux windows
 // +build !js
diff --git a/internal/input/keys_js.go b/internal/input/keys_js.go
index b3c5e5b3d..85599a27c 100644
--- a/internal/input/keys_js.go
+++ b/internal/input/keys_js.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Code generated by genkeys.go using 'go generate'. DO NOT EDIT
+// Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
 // +build js
 
diff --git a/keys.go b/keys.go
index 703bf9e0e..8deea2658 100644
--- a/keys.go
+++ b/keys.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Code generated by genkeys.go using 'go generate'. DO NOT EDIT
+// Code generated by genkeys.go using 'go generate'. DO NOT EDIT.
 
 package ebiten
 
@@ -28,6 +28,8 @@ import (
 type Key int
 
 // Keys.
+//
+// Known issue: KeyKPEnter and KeyKPEqual don't work on Edge browsers.
 const (
 	Key0            Key = Key(input.Key0)
 	Key1            Key = Key(input.Key1)