Test cargo scrape-examples

Author: willcrichton

.gitmodules

@@ -6,7 +6,8 @@
 	url = https://github.com/rust-lang/nomicon.git
 [submodule "src/tools/cargo"]
 	path = src/tools/cargo
-	url = https://github.com/rust-lang/cargo.git
+	url = https://github.com/willcrichton/cargo.git
+	branch = example-analyzer
 [submodule "src/doc/reference"]
 	path = src/doc/reference
 	url = https://github.com/rust-lang/reference.git