more reverts

diff --git a/src/doc/book b/src/doc/book
index f51127530d46b9acbf4747c859da185e771cfcf3..36d65d00164d1750f6fa7f8b0f52dabc3fea500b 160000 (submodule)
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit f51127530d46b9acbf4747c859da185e771cfcf3
+Subproject commit 36d65d00164d1750f6fa7f8b0f52dabc3fea500b

diff --git a/src/llvm b/src/llvm
index 1abfd0e562cc8f7a9577d97ee92246699093b954..56c931901cfb85cd6f7ed44c7d7520a8de1edf97 160000 (submodule)
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit 1abfd0e562cc8f7a9577d97ee92246699093b954
+Subproject commit 56c931901cfb85cd6f7ed44c7d7520a8de1edf97

diff --git a/src/tools/clippy b/src/tools/clippy
index c658fc8cbcd1f199edd445a49cb43139ebdc5f02..ebe0b0eed596243a2839867363cb31d93f0b9754 160000 (submodule)
--- a/src/tools/clippy
+++ b/src/tools/clippy
@@ -1 +1 @@
-Subproject commit c658fc8cbcd1f199edd445a49cb43139ebdc5f02
+Subproject commit ebe0b0eed596243a2839867363cb31d93f0b9754