Update various book repos for the next release.

steveklabnik · steveklabnik · commit 9001b2e09d54 · 2017-06-01T20:29:57.000-04:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit 97422981c53a00f7c3d6584d363443117f179fff
+Subproject commit f746084b099060f55ac5e7d8050797593fcedd6e
diff --git a/src/doc/nomicon b/src/doc/nomicon
@@ -1 +1 @@
-Subproject commit 6fa139b1630a9bb95dcd60cfc90aff9c19e54580
+Subproject commit c0e8c56d76bdf6bd16c64338f81c04d48c60f117
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit f7a108dfa9e90b07821700c55d01f08a9adf005c
+Subproject commit 876582e9d0fbdc9cecb03133c28db96e9ff8c844
