Update books

ehuss · ehuss · commit 3eed7da1f939 · 2020-07-21T07:58:59.000-07:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit 84a31397b34f9d405df44f2899ff17a4828dba18
+Subproject commit a914f2c7e5cdb771fa465de142381a51c53b580e
diff --git a/src/doc/edition-guide b/src/doc/edition-guide
@@ -1 +1 @@
-Subproject commit 82bec5877c77cfad530ca11095db4456d757f668
+Subproject commit bd6e4a9f59c5c1545f572266af77f5c7a5bad6d1
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 0ea7bc494f1289234d8800bb9185021e0ad946f0
+Subproject commit b329ce37424874ad4db94f829a55807c6e21d2cb
