message: Fix doc link for triplet format
diff: @@ -16,7 +16,7 @@ pub use self::csmat::CompressedStorage;
  /// This sparse matrix format is the preferred format for performing arithmetic
  /// operations. Constructing a sparse matrix directly in this format requires
  /// a deep knowledge of its internals. For easier matrix construction, the
  -/// [triplet format](struct.TripletMatBase) is preferred.
  +/// [triplet format](struct.TriMatBase.html) is preferred.
  ///
  /// The `CsMatBase` type is parameterized by the scalar type `N`, the indexing
  /// type `I`, the indexing storage backend types `IptrStorage` and `IndStorage`,
  