Rollup merge of #55189 - steveklabnik:update-books, r=QuietMisdreavus

Manishearth · Manishearth · commit ddf33eaa67ef · 2018-10-20T13:15:45.000-07:00
Sending this PR in today so we can see what linkchecker wants overnight; please don't r+ until travis is green!
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit fa91738b66367b6f70b078251868a071f1991ace
+Subproject commit e871c4598925594421d63e929fee292e6e071f97
diff --git a/src/doc/nomicon b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit 7fd493465b7dd6cf3476f0b834884059bbdd1d93
+Subproject commit 7f7a597b47ed6c35c2a0f0ee6a69050fe2d5e013
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 821355a6fd642b71988a2f88a3162fb358732012
+Subproject commit b9fb838054b8441223c22eeae5b6d8e498071cd0
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit e459fb3f07f2b930ccd25d348671b8eae233fd64
+Subproject commit bc342a475c09b6df8004d518382e6d5b6bcb49f7
