all: format comments with go fmt ./... using Go 1.19

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/doc.go

@@ -6,7 +6,7 @@ functionality for running graphical user interfaces.
 
 See https://gioui.org for instructions to set up and run Gio programs.
 
-Windows
+# Windows
 
 Create a new Window by calling NewWindow. On mobile platforms or when Gio
 is embedded in another project, NewWindow merely connects with a previously
@@ -34,7 +34,7 @@ For example:
 A program must keep receiving events from the event channel until
 DestroyEvent is received.
 
-Main
+# Main
 
 The Main function must be called from a program's main function, to hand over
 control of the main thread to operating systems that need it.
@@ -56,14 +56,13 @@ For example, to display a blank but otherwise functional window:
 		app.Main()
 	}
 
-
-Event queue
+# Event queue
 
 A FrameEvent's Queue method returns an event.Queue implementation that distributes
 incoming events to the event handlers declared in the last frame.
 See the gioui.org/io/event package for more information about event handlers.
 
-Permissions
+# Permissions
 
 The packages under gioui.org/app/permission should be imported
 by a Gio program or by one of its dependencies to indicate that specific

app/os_x11.go

@@ -490,7 +490,6 @@ func (w *x11Window) destroy() {
 
 // atom is a wrapper around XInternAtom. Callers should cache the result
 // in order to limit round-trips to the X server.
-//
 func (w *x11Window) atom(name string, onlyIfExists bool) C.Atom {
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))
@@ -504,7 +503,6 @@ func (w *x11Window) atom(name string, onlyIfExists bool) C.Atom {
 // x11EventHandler wraps static variables for the main event loop.
 // Its sole purpose is to prevent heap allocation and reduce clutter
 // in x11window.loop.
-//
 type x11EventHandler struct {
 	w    *x11Window
 	text []byte
@@ -512,7 +510,6 @@ type x11EventHandler struct {
 }
 
 // handleEvents returns true if the window needs to be redrawn.
-//
 func (h *x11EventHandler) handleEvents() bool {
 	w := h.w
 	xev := h.xev

app/permission/bluetooth/main.go

@@ -4,15 +4,15 @@
 Package bluetooth implements permissions to access Bluetooth and Bluetooth
 Low Energy hardware, including the ability to discover and pair devices.
 
-Android
+# Android
 
 The following entries will be added to AndroidManifest.xml:
 
-    <uses-permission android:name="android.permission.BLUETOOTH"/>
-    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
-    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
-    <uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
-    <uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
+	<uses-permission android:name="android.permission.BLUETOOTH"/>
+	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
+	<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
+	<uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
 
 Note that ACCESS_FINE_LOCATION is required on Android before the Bluetooth
 device may be used.

app/permission/camera/main.go

@@ -3,12 +3,12 @@
 /*
 Package camera implements permissions to access camera hardware.
 
-Android
+# Android
 
 The following entries will be added to AndroidManifest.xml:
 
-    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-feature android:name="android.hardware.camera" android:required="false"/>
+	<uses-permission android:name="android.permission.CAMERA"/>
+	<uses-feature android:name="android.hardware.camera" android:required="false"/>
 
 CAMERA is a "dangerous" permission. See documentation for package
 gioui.org/app/permission for more information.

app/permission/doc.go

@@ -34,7 +34,7 @@ program's source code:
 		_ "net"
 	)
 
-Android -- Dangerous Permissions
+# Android -- Dangerous Permissions
 
 Certain permissions on Android are marked with a protection level of
 "dangerous". This means that, in addition to including the relevant

app/permission/networkstate/main.go

@@ -3,11 +3,10 @@
 /*
 Package networkstate implements permissions to access network connectivity information.
 
-Android
+# Android
 
 The following entries will be added to AndroidManifest.xml:
 
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 */
 package networkstate

app/permission/storage/main.go

@@ -4,12 +4,12 @@
 Package storage implements read and write storage permissions
 on mobile devices.
 
-Android
+# Android
 
 The following entries will be added to AndroidManifest.xml:
 
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
 READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE are "dangerous" permissions.
 See documentation for package gioui.org/app/permission for more information.

app/permission/wakelock/wakelock.go

@@ -4,11 +4,10 @@
 Package wakelock implements permission to acquire locks that keep the system
 from suspending.
 
-Android
+# Android
 
 The following entries will be added to AndroidManifest.xml:
 
-    <uses-permission android:name="android.permission.WAKE_LOCK"/>
-
+	<uses-permission android:name="android.permission.WAKE_LOCK"/>
 */
 package wakelock