Opt out -Zrustdoc-scrape-examples on docs.rs

I'd like a chance to audit all the code that rustdoc is inserting into
the docs. Currently I am skeptical that showing serde's internal usages
of APIs is a net benefit to the public documentation. I am also
skeptical that quite so many examples are needed, and that they should
be featured so prominently in comparison to handwritten docs. Lastly I
wish there were a way to turn this behavior off on a more granular
basis.

serde/Cargo.toml

@@ -20,6 +20,9 @@ serde_derive = { version = "=1.0.151", optional = true, path = "../serde_derive"
 [dev-dependencies]
 serde_derive = { version = "1.0", path = "../serde_derive" }
 
+[lib]
+doc-scrape-examples = false
+
 [package.metadata.playground]
 features = ["derive", "rc"]
 

serde_test/Cargo.toml

@@ -21,5 +21,8 @@ serde = { version = "1.0.60", path = "../serde" }
 serde = { version = "1.0", path = "../serde" }
 serde_derive = { version = "1.0", path = "../serde_derive" }
 
+[lib]
+doc-scrape-examples = false
+
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]