fixed typo

context.go

@@ -383,7 +383,7 @@ func (c *Context) Param(key string) string {
 	return c.Params.ByName(key)
 }
 
-// AddParam adds param to context an
+// AddParam adds param to context and
 // replaces path param key with given value for e2e testing purposes
 // Example Route: "/user/:id"
 // AddParam("id", 1)