chore: fix typos (#2122)

* refactor: fix typos

* Update help.go

Co-authored-by: Noah Hsu <i@nn.ci>

pkg/gowebdav/utils_test.go

@@ -17,7 +17,7 @@ func TestJoin(t *testing.T) {
 func eq(t *testing.T, expected string, s0 string, s1 string) {
 	s := Join(s0, s1)
 	if s != expected {
-		t.Error("For", "'"+s0+"','"+s1+"'", "expeted", "'"+expected+"'", "got", "'"+s+"'")
+		t.Error("For", "'"+s0+"','"+s1+"'", "expected", "'"+expected+"'", "got", "'"+s+"'")
 	}
 }