add failing test

tests/pass/code-block-in-list/Cargo.toml

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+[package]
+name = "code_block_in_list"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[lib]
+path = "lib.rs"

tests/pass/code-block-in-list/README.j2

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+{{readme}}

tests/pass/code-block-in-list/README.md

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+This is an example testing code blocks in lists
+
+* in the past, this has caused issues
+
+* one of such cases was [\#440][__link0]
+
+* therefore, we have this example/test:
+
+  ```rust
+  struct Foo {
+      bar: usize
+  }
+  ```

tests/pass/code-block-in-list/lib.rs

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+//! This is an example testing code blocks in lists
+//! 
+//!   - in the past, this has caused issues
+//!   - one of such cases was [#440](https://github.com/msrd0/cargo-doc2readme/issues/440)
+//!   - therefore, we have this example/test:
+//!     
+//!     ```rust
+//!     # #[derive(Clone, Copy)]
+//!     struct Foo {
+//!         bar: usize
+//!     }
+//!     ```