Resolve issues from code review comments

js/modules/k6/html/html.go

@@ -143,7 +143,7 @@ func (s Selection) adjacentUntil(until func(string) *goquery.Selection,
 		}
 	}
 
-	err := fmt.Errorf("invalid argument, cannot use a %T as a selector", def[0].Export())
+	err := fmt.Errorf("invalid argument, cannot use a '%T' as a selector", def[0].Export())
 	panic(s.rt.NewGoError(err))
 }
 

lib/netext/httpext/error_codes_syscall_posix.go

@@ -1,3 +1,23 @@
+/*
+ *
+ * k6 - a next-generation load testing tool
+ * Copyright (C) 2021 Load Impact
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 // +build !windows
 
 package httpext

lib/netext/httpext/error_codes_syscall_windows.go

@@ -1,3 +1,23 @@
+/*
+ *
+ * k6 - a next-generation load testing tool
+ * Copyright (C) 2021 Load Impact
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 package httpext
 
 import (