Test that code does not get smart-punctuated

Author: camelid

src/test/rustdoc/smart-punct.rs

@@ -1,3 +1,5 @@
+// ignore-tidy-linelength
+
 #![crate_name = "foo"]
 
 //! This is the "start" of the 'document'! How'd you know that "it's" the start?
@@ -7,7 +9,22 @@
 //! [link with "smart punct'" -- yessiree!][]
 //!
 //! [link with "smart punct'" -- yessiree!]: https://www.rust-lang.org
+//!
+//! # Code should not be smart-punct'd
+//!
+//! `this inline code -- it shouldn't have "smart punct"`
+//!
+//! ```
+//! let x = "don't smart-punct me -- please!";
+//! ```
+//!
+//! ```text
+//! I say "don't smart-punct me -- please!"
+//! ```
 
 // @has "foo/index.html" "//p" "This is the “start” of the ‘document’! How’d you know that “it’s” the start?"
 // @has "foo/index.html" "//h1" "Header with “smart punct’”"
 // @has "foo/index.html" '//a[@href="https://www.rust-lang.org"]' "link with “smart punct’” – yessiree!"
+// @has "foo/index.html" '//code' 'this inline code -- it shouldn\'t have "smart punct"'
+// @has "foo/index.html" '//pre' 'let x = "don\'t smart-punct me -- please!";'
+// @has "foo/index.html" '//pre' 'I say "don\'t smart-punct me -- please!"'