explicitly sync writes to files in the test; likely necessary on some…

… systems for changes to be detected properly

contrib/lib/tests/templates.rs

@@ -128,6 +128,7 @@ mod templates_tests {
  fn write_file(path: &Path, text: &str) {
  let mut file = File::create(path).expect("open file");
  file.write_all(text.as_bytes()).expect("write file");
+ file.sync_all().expect("sync file");
  }
 
  const RELOAD_TEMPLATE: &'static str = "hbs/reload";