Update books

diff --git a/src/doc/book b/src/doc/book
index a90f07f1e9a7fc75dc9105a6c6f16d5c13edceb0..eac55314210519238652f12b30fec9daea61f7fe 160000 (submodule)
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit a90f07f1e9a7fc75dc9105a6c6f16d5c13edceb0
+Subproject commit eac55314210519238652f12b30fec9daea61f7fe

diff --git a/src/doc/edition-guide b/src/doc/edition-guide
index 5d57b3832f8d308a9f478ce0a69799548f27ad4d..af696ce8ea526445590ae0ca66a8128d2a95a69a 160000 (submodule)
--- a/src/doc/edition-guide
+++ b/src/doc/edition-guide
@@ -1 +1 @@
-Subproject commit 5d57b3832f8d308a9f478ce0a69799548f27ad4d
+Subproject commit af696ce8ea526445590ae0ca66a8128d2a95a69a

diff --git a/src/doc/embedded-book b/src/doc/embedded-book
index 506840eb73b0749336e1d5274e16d6393892ee82..09986cd352404eb4659db44613b27cac9aa652fc 160000 (submodule)
--- a/src/doc/embedded-book
+++ b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit 506840eb73b0749336e1d5274e16d6393892ee82
+Subproject commit 09986cd352404eb4659db44613b27cac9aa652fc

diff --git a/src/doc/reference b/src/doc/reference
index ab60513a3a5a0591e237fddff5d027a982648392..82d75cf423e4a7824fb36e73ccb18519d6900610 160000 (submodule)
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit ab60513a3a5a0591e237fddff5d027a982648392
+Subproject commit 82d75cf423e4a7824fb36e73ccb18519d6900610

diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 028f93a61500fe8f746ee7cc6b204ea6c9f42935..1db6bb483cc87ad3b424d9aba764fe622960a1be 160000 (submodule)
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 028f93a61500fe8f746ee7cc6b204ea6c9f42935
+Subproject commit 1db6bb483cc87ad3b424d9aba764fe622960a1be

diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
index 60e282559104035985331645907c3d9f842312c5..93422c21baca585dc88357ec886a48f6ddc7d665 160000 (submodule)
--- a/src/doc/rustc-dev-guide
+++ b/src/doc/rustc-dev-guide
@@ -1 +1 @@
-Subproject commit 60e282559104035985331645907c3d9f842312c5
+Subproject commit 93422c21baca585dc88357ec886a48f6ddc7d665