Update books

diff --git a/src/doc/book b/src/doc/book
index eb1282ec444db94055fa9531b6f3f803e86bb382..fd9299792852c9a368cb236748781852f75cdac6 160000 (submodule)
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit eb1282ec444db94055fa9531b6f3f803e86bb382
+Subproject commit fd9299792852c9a368cb236748781852f75cdac6

diff --git a/src/doc/embedded-book b/src/doc/embedded-book
index 270fccd339e5972d9c900e788f197e81a0bcd956..51739471276b1776dea27cf562b974ef07e24685 160000 (submodule)
--- a/src/doc/embedded-book
+++ b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit 270fccd339e5972d9c900e788f197e81a0bcd956
+Subproject commit 51739471276b1776dea27cf562b974ef07e24685

diff --git a/src/doc/nomicon b/src/doc/nomicon
index 2d66852a27c5d0ec50ae021820d1de22caa2b1bd..358e6a61d5f4f0496d0a81e70cdcd25d05307342 160000 (submodule)
--- a/src/doc/nomicon
+++ b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit 2d66852a27c5d0ec50ae021820d1de22caa2b1bd
+Subproject commit 358e6a61d5f4f0496d0a81e70cdcd25d05307342

diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 9a60624fcad0140826c44389571dc622917cd632..27f1ff5e440ef78828b68ab882b98e1b10d9af32 160000 (submodule)
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 9a60624fcad0140826c44389571dc622917cd632
+Subproject commit 27f1ff5e440ef78828b68ab882b98e1b10d9af32