improve builder deprecation messages

It's convention in the Go community that a function's deprecation notice
is separated by a new paragraph from the function's documentation. Tools
like staticcheck determine if a function has been deprecated by checking
the beginning of new paragraphs.

This changelist modifies the deprecation notices in the builder package
to follow this convention, allowing linters like staticcheck,
gometalinter, and golangci-lint to warn users of the package.

pkg/builder/build.go

@@ -50,6 +50,7 @@ type Builder struct {
 }
 
 // SimpleController returns a new Builder.
+//
 // Deprecated: Use ControllerManagedBy(Manager) instead.
 func SimpleController() *Builder {
 	return &Builder{}
@@ -64,6 +65,7 @@ func ControllerManagedBy(m manager.Manager) *Builder {
 // update events by *reconciling the object*.
 // This is the equivalent of calling
 // Watches(&source.Kind{Type: apiType}, &handler.EnqueueRequestForObject{})
+//
 // Deprecated: Use For
 func (blder *Builder) ForType(apiType runtime.Object) *Builder {
 	return blder.For(apiType)
@@ -99,13 +101,15 @@ func (blder *Builder) Watches(src source.Source, eventhandler handler.EventHandl
 }
 
 // WithConfig sets the Config to use for configuring clients.  Defaults to the in-cluster config or to ~/.kube/config.
+//
 // Deprecated: Use ControllerManagedBy(Manager) and this isn't needed.
 func (blder *Builder) WithConfig(config *rest.Config) *Builder {
 	blder.config = config
 	return blder
 }
 
 // WithManager sets the Manager to use for registering the ControllerManagedBy.  Defaults to a new manager.Manager.
+//
 // Deprecated: Use ControllerManagedBy(Manager) and this isn't needed.
 func (blder *Builder) WithManager(m manager.Manager) *Builder {
 	blder.mgr = m
@@ -127,6 +131,7 @@ func (blder *Builder) Complete(r reconcile.Reconciler) error {
 }
 
 // Build builds the Application ControllerManagedBy and returns the Manager used to start it.
+//
 // Deprecated: Use Complete
 func (blder *Builder) Build(r reconcile.Reconciler) (manager.Manager, error) {
 	if r == nil {