all: format code according to Go 1.19 rules

Go 1.19 started reformatting code in a way that makes it more obvious
how it will be rendered on pkg.go.dev. It gets it almost right, but not
entirely. Therefore, I had to modify some of the comments so that they
are formatted correctly.

src/runtime/scheduler_any.go

@@ -6,6 +6,7 @@ package runtime
 import "internal/task"
 
 // Pause the current task for a given time.
+//
 //go:linkname sleep time.Sleep
 func sleep(duration int64) {
 	if duration <= 0 {