Rollup merge of #40732 - petrochenkov:booktidy, r=steveklabnik

frewsxcv · web-flow · commit 0e57709161e1 · 2017-03-22T19:30:35.000-04:00
Update the book submodule and fix tidy When the book was included into https://github.com/rust-lang/rust as a submodule, tidy started failing on Windows. rust-lang/book#549 fixed the problem, now the submodule needs to be updated.
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit e6d6caab41471f7115a621029bd428a812c5260e
+Subproject commit 9bd223ca406b1170a24942d6474f9e8a56f4a420
