Update module-level docs
//! which also uses the Matrix Market file format.
//!
//! We currently offer functionality for importing a Matrix market file to an instance of a
-//! [CooMatrix](crate::CooMatrix) through the function [load_coo_from_matrix_market_file]. It is also possible to load
-//! a matrix stored in the matrix market format with the function [load_coo_from_matrix_market_str].
-//!
-//! Export is currently not implemented, but [planned](https://github.com/dimforge/nalgebra/issues/1037).
+//! [CooMatrix](crate::CooMatrix) through the function [load_coo_from_matrix_market_file],
+//! as well as functionality for writing various sparse matrices to the matrix market format
+//! through [write_to_matrix_market_file]. It is also possible to load
+//! a matrix stored as a string in the matrix market format with the function
+//! [load_coo_from_matrix_market_str], or similarly write to a string with
+//! [write_to_matrix_market_str].
//!
//! Our implementation is based on the [format description](https://math.nist.gov/MatrixMarket/formats.html)
//! on the Matrix Market website and the
