rust: cleanup some white space in a dock
They seems to have sneaked there somehow.
Differential Revision: https://phab.mercurial-scm.org/D9201
--- a/rust/hg-core/src/dirstate/dirstate_tree/tree.rs Sat Oct 10 13:19:25 2020 +0530
+++ b/rust/hg-core/src/dirstate/dirstate_tree/tree.rs Thu Oct 08 18:50:46 2020 +0200
@@ -37,7 +37,7 @@
/// Only the first two items in this list are implemented as of this commit.
///
/// [1]: https://www.mercurial-scm.org/wiki/DirsCachePlan
-///
+///
///
/// # Structure
///