Update and add package synopsis for where useful (#1137)

This commit adds useful package synopsis to packages for displaying a description on for example pkg.go.dev.
It also updated a couple existing ones and some spelling mistakes in the code.

CHANGELOG.md

@@ -34,7 +34,7 @@ More detailed release notes can be found on the [releases page](https://github.c
 * Apps started on a goroutine will now panic as this is not supported
 * On Linux apps now simulate 120DPI instead of 96DPI
 * Improved fyne_settings scale picking user interface
-* Reorganised fyne_demo to accomodate growing collection of widgets and containers
+* Reorganised fyne_demo to accommodate growing collection of widgets and containers
 * Rendering now happens on a different thread to events for more consistent drawing
 * Improved text selection on mobile devices
 

cmd/fyne_demo/main.go

@@ -1,4 +1,4 @@
-// Package main provides various examples of Fyne API capabilities
+// Package main provides various examples of Fyne API capabilities.
 package main
 
 import (

cmd/hello/main.go

@@ -1,4 +1,4 @@
-// Package main loads a very basic Hello World graphical application
+// Package main loads a very basic Hello World graphical application.
 package main
 
 import (

dialog/base.go

@@ -1,4 +1,4 @@
-// Package dialog defines standard dialog windows for application GUIs
+// Package dialog defines standard dialog windows for application GUIs.
 package dialog // import "fyne.io/fyne/dialog"
 
 import (

driver/desktop/driver.go

@@ -1,3 +1,4 @@
+// Package desktop provides desktop specific driver functionality.
 package desktop
 
 import "fyne.io/fyne"

driver/mobile/device.go

@@ -1,3 +1,4 @@
+// Package mobile provides mobile specific driver functionality.
 package mobile
 
 // Device describes functionality only available on mobile

storage/file.go

@@ -1,3 +1,4 @@
+// Package storage provides storage access and management functionality.
 package storage
 
 import (

tools/playground/playground.go

@@ -1,3 +1,4 @@
+// Package playground provides tooling for running fyne applications inside the Go playground.
 package playground
 
 import (

widget/menu_internal_test.go

@@ -38,7 +38,7 @@ func TestMenu_ItemTapped(t *testing.T) {
 	test.Tap(mi2)
 	assert.True(t, tapped)
 	assert.True(t, dismissed, "tap on item dismisses the menu")
-	assert.True(t, m.Visible(), "tap on item does not hide the menu … OnDismiss is reponsible for that")
+	assert.True(t, m.Visible(), "tap on item does not hide the menu … OnDismiss is responsible for that")
 
 	dismissed = false // reset
 	mi3.MouseIn(nil)
@@ -49,7 +49,7 @@ func TestMenu_ItemTapped(t *testing.T) {
 
 	test.Tap(smi)
 	assert.True(t, dismissed, "tap on sub item dismisses the root menu")
-	assert.True(t, m.Visible(), "tap on item does not hide the menu … OnDismiss is reponsible for that")
+	assert.True(t, m.Visible(), "tap on item does not hide the menu … OnDismiss is responsible for that")
 	assert.False(t, sm.Visible(), "tap on sub item hides the sub menu")
 
 	newActionTapped := false

widget/splitcontainer.go

@@ -33,7 +33,7 @@ func NewVSplitContainer(top, bottom fyne.CanvasObject) *SplitContainer {
 
 func newSplitContainer(horizontal bool, leading, trailing fyne.CanvasObject) *SplitContainer {
 	s := &SplitContainer{
-		Offset:     0.5, // Sensible default, can be overriden with SetOffset
+		Offset:     0.5, // Sensible default, can be overridden with SetOffset
 		Horizontal: horizontal,
 		Leading:    leading,
 		Trailing:   trailing,

widget/text_test.go

@@ -303,7 +303,7 @@ func TestText_splitLines(t *testing.T) {
 			},
 		},
 		{
-			name: "Muliple_Trailing",
+			name: "Multiple_Trailing",
 			text: "foo\nbar\n",
 			want: [][2]int{
 				{0, 3},

widget/textgrid.go

@@ -24,7 +24,7 @@ var (
 	TextGridStyleWhitespace TextGridStyle
 )
 
-// define the types seperately to the var definition so the custom style API is not leaked in their instances.
+// define the types separately to the var definition so the custom style API is not leaked in their instances.
 func init() {
 	TextGridStyleDefault = &CustomTextGridStyle{}
 	TextGridStyleWhitespace = &CustomTextGridStyle{FGColor: theme.ButtonColor()}