id: mod-declarations-contiguous
valid:
  - |
    pub mod a;
    mod b;
  # Blank lines between visibility groups are not a split.
  - |
    pub mod a;

    mod b;
  # A comment between two declarations does not split the run.
  - |
    pub mod a;
    // documentation
    pub mod b;
  # An attribute is part of a run.
  - |
    pub mod a;
    #[cfg(test)]
    mod tests;
  # A single run does not have to sit at the top of the file.
  - |
    use std::fmt;

    mod a;
    mod b;
  # An attributed declaration may stand alone, which keeps this legal.
  - |
    mod a;

    use std::fmt;

    #[cfg(test)]
    mod tests;
invalid:
  - |
    mod a;

    use std::fmt;

    pub mod b;
  # A comment must not hide a stray declaration.
  - |
    mod a;

    use std::fmt;

    // documentation
    pub mod b;