design/go2draft-type-parameters: fix typo

Change-Id: Id468d065c574ce7913063a31bf0256100b29a763
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/238417
Reviewed-by: Toshihiro Shiino <shiino.toshihiro@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/design/go2draft-type-parameters.md b/design/go2draft-type-parameters.md
index 3fda094..5b4a344 100644
--- a/design/go2draft-type-parameters.md
+++ b/design/go2draft-type-parameters.md
@@ -1122,7 +1122,7 @@
 // The type argument must be passed explicitly at the call site.
 //
 // This example compiles but is unlikely to work as desired.
-func FromStrings(type T Setter)(s []string) []T) {
+func FromStrings(type T Setter)(s []string) []T {
 	result := make([]T, len(s))
 	for i, v := range s {
 		result[i].Set(v)