Update books

ehuss · ehuss · commit a3115b3d450d · 2021-09-14T17:57:07.000-07:00
diff --git a/src/doc/embedded-book b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit c3a51e23859554369e6bbb5128dcef0e4f159fb5
+Subproject commit 4c76da9ddb4650203c129fceffdea95a3466c205
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 04f489c889235fe3b6dfe678ae5410d07deda958
+Subproject commit 9d4132b56c4999cd3ce1aeca5f1b2f2cb0d11c24
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
@@ -1 +1 @@
-Subproject commit 95f1acf9a39d6f402f654e917e2c1dfdb779c5fc
+Subproject commit 9198465b6ca8bed669df0cbb67c0e6d0b140803c
