rust-lang / rust-lang/rustfmt

Bug: trailing spaces left after formatting

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#6,604 4 comments 0 reactions 0 assignees View on GitHub

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A-comments I-trailing-whitespace
Dominant language
Rust
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Description

I think not duplicate of #6568 because this keeps the trailing spaces for every style edition, also this is about a doc comment.

Code:

struct Struct {
    /// trailing spaces:               
    field: (),
}

Code remains the same after running cargo fmt, checked with rustfmt directly that on every style edition this behavior is the same.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the example with cargo fmt and rustfmt directly, comparing behavior across style editions. Trace rustfmt's handling of Rust doc comments and ensure the trailing spaces in the example are removed; the result should be verified with a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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