rust-docstrings: add missing module docstrings

Differential Revision: https://phab.mercurial-scm.org/D6630

rust/hg-core/src/filepatterns.rs

@@ -1,3 +1,12 b''
+// filepatterns.rs
+//
+// Copyright 2019 Raphaël Gomès <[e-mail]>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+//! Handling of Mercurial-specific patterns.
+
 use crate::{
     utils::{files::get_path_from_bytes, SliceExt},
     LineNumber, PatternError, PatternFileError,

rust/hg-core/src/utils.rs

@@ -1,3 +1,12 b''
+// utils module
+//
+// Copyright 2019 Raphaël Gomès <[e-mail]>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+//! Contains useful functions, traits, structs, etc. for use in core.
+
 pub mod files;
 
 use std::convert::AsMut;

rust/hg-core/src/utils/files.rs

@@ -1,3 +1,14 b''
+// files.rs
+//
+// Copyright 2019
+// Raphaël Gomès <[e-mail]>,
+// Yuya Nishihara <[e-mail]>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+//! Functions for fiddling with files.
+
 use std::iter::FusedIterator;
 use std::path::Path;