docs: wrap synchronous API docs in feature blocks

Author: brianheineman

postgresql_archive/src/lib.rs

@@ -34,12 +34,14 @@
 //!
 //! ### Synchronous API
 //! ```no_run
+//! #[cfg(feature = "blocking")] {
 //! use postgresql_archive::LATEST;
 //! use postgresql_archive::blocking::{extract, get_archive};
 //!
 //! let (archive_version, archive, hash) = get_archive(&LATEST).unwrap();
 //! let out_dir = std::env::temp_dir();
 //! let result = extract(&archive, &out_dir).unwrap();
+//! }
 //! ```
 //!
 //! ## Feature flags

postgresql_embedded/src/lib.rs

@@ -42,6 +42,7 @@
 //!
 //! ### Synchronous API
 //! ```no_run
+//! #[cfg(feature = "blocking")] {
 //! use postgresql_embedded::blocking::PostgreSQL;
 //!
 //! let mut postgresql = PostgreSQL::default();
@@ -54,6 +55,7 @@
 //! postgresql.drop_database(database_name).unwrap();
 //!
 //! postgresql.stop().unwrap();
+//! }
 //! ```
 //!
 //! ## Information