Fixes after review

jlexer/lexer.go

@@ -345,7 +345,7 @@ func (r *Lexer) fetchString() {
 	isValid, hasEscapes, length := findStringLen(data)
 	if !isValid {
 		r.pos += length
-		r.errParse("missing trailing string literal")
+		r.errParse("unterminated string literal")
 		return
 	}
 	if !hasEscapes {

jlexer/lexer_test.go

@@ -317,17 +317,17 @@ func TestFetchStringUnterminatedString(t *testing.T) {
 	for _, test := range []struct {
 		data []byte
 	}{
-		{data: []byte(`"sting without trailing literal`)},
+		{data: []byte(`"sting without trailing quote`)},
 		{data: []byte(`"\"`)},
 		{data: []byte{'"'}},
 	} {
 		l := Lexer{Data: test.data}
 		l.fetchString()
 		if l.pos > len(l.Data) {
-			t.Errorf("pos should not be greater than length of Data")
+			t.Errorf("fetchString(%s): pos should not be greater than length of Data", test.data)
 		}
 		if l.Error() == nil {
-			t.Errorf("fetchString() should add parsing error")
+			t.Errorf("fetchString(%s): should add parsing error", test.data)
 		}
 	}
 }