/// ```rust
/// # use std::fmt::Write;
/// # let mut buf = String::new();
- ///
/// // Bad
/// writeln!(buf, "");
///
/// # use std::fmt::Write;
/// # let mut buf = String::new();
/// # let name = "World";
- ///
/// // Bad
/// write!(buf, "Hello {}!\n", name);
///
/// ```rust
/// # use std::fmt::Write;
/// # let mut buf = String::new();
- ///
/// // Bad
/// writeln!(buf, "{}", "foo");
///