update books

steveklabnik · pietroalbini · commit f89c3a271dfb · 2018-11-22T23:15:23.000+01:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit e871c4598925594421d63e929fee292e6e071f97
+Subproject commit 616fe4172b688393aeee5f34935cc25733c9c062
diff --git a/src/doc/nomicon b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit 7f7a597b47ed6c35c2a0f0ee6a69050fe2d5e013
+Subproject commit f8a4e96feb2e5a6ed1ef170ad40e3509a7755cb4
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit b9fb838054b8441223c22eeae5b6d8e498071cd0
+Subproject commit 60077efda319c95a89fe39609803c5433567adbf
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit bc342a475c09b6df8004d518382e6d5b6bcb49f7
+Subproject commit 2ce92beabb912d417a7314d6da83ac9b50dc2afb
