fix: doc formatting

src/lib.rs

@@ -28,11 +28,12 @@
 //! the `NamedTempFile` type for more information.
 //!
 //! ## Early drop pitfall
+//!
 //! Because `TempDir` and `NamedTempFile` rely on their destructors for cleanup, this can lead
 //! to an unexpected early removal of the directory/file, usually when working with APIs which are
 //! generic over `AsRef<Path>`. Consider the following example:
 //!
-//! ```
+//! ```no_run
 //! # use tempfile::tempdir;
 //! # use std::io;
 //! # use std::process::Command;
@@ -44,6 +45,7 @@
 //! # fn run() -> Result<(), io::Error> {
 //! // Create a directory inside of `std::env::temp_dir()`.
 //! let temp_dir = tempdir()?;
+//!
 //! // Spawn the `touch` command inside the temporary directory and collect the exit status
 //! // Note that `temp_dir` is **not** moved into `current_dir`, but passed as a reference
 //! let exit_status = Command::new("touch").arg("tmp").current_dir(&temp_dir).status()?;
@@ -52,13 +54,14 @@
 //! # Ok(())
 //! # }
 //! ```
+//!
 //! This works because a reference to `temp_dir` is passed to `current_dir`, resulting in the
 //! destructor of `temp_dir` being run after the `Command` has finished execution. Moving the
 //! `TempDir` into the `current_dir` call would result in the `TempDir` being converted into
 //! an internal representation, with the original value being dropped and the directory thus
 //! being deleted, before the command can be executed.
-//! The `touch` command would fail with an `No such file or directory` error.
 //!
+//! The `touch` command would fail with an `No such file or directory` error.
 //!
 //! ## Examples
 //!