Update books

ehuss · ehuss · commit fdd592acd072 · 2021-01-25T15:10:10.000-08:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit ac57a0ddd23d173b26731ccf939f3ba729753275
+Subproject commit e724bd826580ff95df48a8533af7dec1080693d4
diff --git a/src/doc/nomicon b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit a8584998eacdea7106a1dfafcbf6c1c06fcdf925
+Subproject commit bbf06ad39d1f45654047e9596b750cc6e6d1b693
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 50af691f838937c300b47812d0507c6d88c14f97
+Subproject commit f02b09eb6e8af340ad1256a54adb7aae2ff3163e
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 03e23af01f0b4f83a3a513da280e1ca92587f2ec
+Subproject commit f633769acef68574427a6fae6c06f13bc2199573
