WTF-748 Fixes and improves module templating (#786)

Fixes and improves the module templating for creating new bare-bones
text widgets.

This command:

    WTF_WIDGET_NAME=MyNewWidget go generate -run=text

now properly generates:

    * the module directory in the /modules directory
    * the widget.go file
    * the settings.go file

with no linter warnings or errors.

Signed-off-by: Chris Cummer <chriscummer@me.com>

modules/digitalclock/display.go

@@ -24,5 +24,4 @@ func (widget *Widget) display() {
 	widget.Redraw(func() (string, string, bool) {
 		return widget.CommonSettings().Title, renderWidget(*widget.settings), false
 	})
-
 }

modules/digitalclock/settings.go

@@ -10,9 +10,8 @@ const (
 	defaultTitle     = "Clocks"
 )
 
-// Settings struct to define settings got digital clock
+// Settings defines the configuration properties for this module
 type Settings struct {
-	// hello
 	common *cfg.Common
 
 	hourFormat string `help:"The format of the clock." values:"12 or 24"`
@@ -20,7 +19,7 @@ type Settings struct {
 	font       string `help:"The font of the clock." values:"bigfont or digitalfont"`
 }
 
-// NewSettingsFromYAML functino to create setting instance from yaml file
+// NewSettingsFromYAML creates a new settings instance from a YAML config block
 func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *config.Config) *Settings {
 
 	settings := Settings{

modules/digitalclock/widget.go

@@ -5,7 +5,7 @@ import (
 	"github.com/wtfutil/wtf/view"
 )
 
-// Widget a text widget struct to hold info about the current widget
+// Widget is a text widget struct to hold info about the current widget
 type Widget struct {
 	view.TextWidget
 
@@ -15,7 +15,6 @@ type Widget struct {
 
 // NewWidget creates a new widget using settings
 func NewWidget(app *tview.Application, settings *Settings) *Widget {
-
 	widget := Widget{
 		TextWidget: view.NewTextWidget(app, settings.common),
 
@@ -30,9 +29,5 @@ func NewWidget(app *tview.Application, settings *Settings) *Widget {
 
 // Refresh updates the onscreen contents of the widget
 func (widget *Widget) Refresh() {
-	widget.app.QueueUpdateDraw(func() {
-		widget.display()
-	})
+	widget.display()
 }
-
-/* -------------------- Unexported Functions -------------------- */

modules/digitalocean/widget.go

@@ -28,7 +28,7 @@ func (t *tokenSource) Token() (*oauth2.Token, error) {
 
 /* -------------------- Widget -------------------- */
 
-// Widget is the container for transmission data
+// Widget is the container for droplet data
 type Widget struct {
 	view.KeyboardWidget
 	view.ScrollableWidget