Partial go fmt. Will do the rest over the next few commits. While I'm not too happy about it, everyone else uses go fmt, and pull requests will be more convenient if I just do it. (Also do it now, because when I change the Windows backend things are going to change...)

uitask_darwin.go

@@ -54,6 +54,6 @@ func initCocoa() (err error) {
 
 //export appDelegate_uitask
 func appDelegate_uitask(p unsafe.Pointer) {
-	f := (*func ())(unsafe.Pointer(p))
+	f := (*func())(unsafe.Pointer(p))
 	(*f)()
 }

uitask_windows.go

@@ -4,9 +4,9 @@ package ui
 
 import (
 	"fmt"
+	"runtime"
 	"syscall"
 	"unsafe"
-	"runtime"
 )
 
 /*