Copy non-macro code generators paragraph from readme to rustdoc

src/lib.rs

@@ -79,6 +79,17 @@
 //!     }
 //! };
 //! ```
+//!
+//! <br>
+//!
+//! # Non-macro code generators
+//!
+//! When using `quote` in a build.rs or main.rs and writing the output out to a
+//! file, consider having the code generator pass the tokens through
+//! [prettyplease] before writing. This way if an error occurs in the generated
+//! code it is convenient for a human to read and debug.
+//!
+//! [prettyplease]: https://github.com/dtolnay/prettyplease
 
 // Quote types in rustdoc of other crates get linked to here.
 #![doc(html_root_url = "https://docs.rs/quote/1.0.26")]