Update books

ehuss · ehuss · commit 57c88ca40ecf · 2022-05-25T12:45:28.000-07:00
diff --git a/src/doc/book b/src/doc/book
@@ -1 +1 @@
-Subproject commit d9415b7cbfcb4b24062683f429bd0ff535396362
+Subproject commit b4dd5f00b87190ad5ef42cbc2a88a783c6ae57ef
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 8e36971959ff238b5aa2575fbc7a2e09e1313e82
+Subproject commit b74825d8f88b685e239ade00f00de68ba4cd63d4
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit e9f93cfcf410bc092c9107b8a41a82f144c761f2
+Subproject commit 2ed26865e8c29ef939dc913a97bd321cadd72a9a
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
@@ -1 +1 @@
-Subproject commit 0c02acdb6f48f03907a02ea8e537c3272b4fde9f
+Subproject commit 554c00e4805df7f7bffac7db408437d62d6dfb9a
