Merge pull request #562 from AA-Turner/gitattributes-linguist

Instruct linguist to include ``.rst`` files in the statistics

Author: traviscross

.gitattributes

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: MIT OR Apache-2.0
+# SPDX-FileCopyrightText: The Rust Project Developers
+
+# Instruct linguist not to ignore the main content
+# https://github.com/github-linguist/linguist/blob/master/docs/overrides.md
+src/*.rst text linguist-detectable