In the example code here there is a leading sharp in the first line that shouldn't be there. In the generated rustdoc it's not present.
Wrong Behaviour
The sharp followed by an empty line is included. Screenshot from the generated README:

Expected Behaviour
The sharp, along with the rest of the line, should not be included. Screenshot from the rustdoc:

Setup
Issue happens on both ArchLinux and AlpineLinux, Rust/Cargo 1.38.0, Cargo-Readme 3.1.2