Auto merge of #67689 - mark-i-m:update-guide, r=JohnTitor

bors · bors · commit aaca5f1d76cd · 2020-01-02T00:37:03.000Z
Update rustc-guide r? @ehuss cc @rust-lang/wg-learning
diff --git a/src/doc/rustc-guide b/src/doc/rustc-guide
@@ -1 +1 @@
-Subproject commit 7c56708aab7986ca390221e8e8902f7de7f9b076
+Subproject commit b5c6babcdd4ce1fa90458b7827a5fde082e79e87
