Fix warning in example

Author: fornwall

examples/time-without-main.ers

@@ -1,12 +1,12 @@
 #!/usr/bin/env rust-script
-//! This is a regular crate doc comment, but it also contains a partial
-//! Cargo manifest.  Note the use of a *fenced* code block, and the
-//! `cargo` "language".
-//!
-//! ```cargo
-//! [dependencies]
-//! time = "0.1.25"
-//! ```
+/// This is a regular crate doc comment, but it also contains a partial
+/// Cargo manifest.  Note the use of a *fenced* code block, and the
+/// `cargo` "language".
+///
+/// ```cargo
+/// [dependencies]
+/// time = "0.1.25"
+/// ```
 
 use time::now;