Update books

ehuss · ehuss · commit b50c13cc28b3 · 2020-07-07T13:53:46.000-07:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit 4e7c00bece1544d409312ec93467beb62b5bd0cb
+Subproject commit 84a31397b34f9d405df44f2899ff17a4828dba18
diff --git a/src/doc/embedded-book b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit 616962ad0dd80f34d8b802da038d0aed9dd691bb
+Subproject commit 94d9ea8460bcbbbfef1877b47cb930260b5849a7
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 04d5d5d7ba624b6f5016298451f3a63d557f3260
+Subproject commit 0ea7bc494f1289234d8800bb9185021e0ad946f0
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 6f94ccb48da6fa4ed0031290f21411cf789f7d5e
+Subproject commit 229c6945a26a53a751ffa4f9cb418388c00029d3
