testFrom: use test.Diff

cl/instr.go

@@ -334,7 +334,7 @@ var llgoInstrs = map[string]int{
 // funcOf returns a function by name and set ftype = goFunc, cFunc, etc.
 // or returns nil and set ftype = llgoCstr, llgoAlloca, llgoUnreachable, etc.
 func (p *context) funcOf(fn *ssa.Function) (aFn llssa.Function, pyFn llssa.PyObjRef, ftype int) {
-	pkgTypes, name, ftype := p.funcName(fn, false)
+	pkgTypes, name, ftype := p.funcName(fn)
 	switch ftype {
 	case pyFunc:
 		if kind, mod := pkgKindByScope(pkgTypes.Scope()); kind == PkgPyModule {