Spaces arround equal signs are not added consitently
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- Dominant language
- Rust
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Description
I discovered an inconsistent behavior of rustfmt (1.8.0-stable (29483883ee 2025-08-04) used via cargo fmt) at spaces around =:
This line gets fixed
#[arg(short='f', long)]
into
#[arg(short = 'f', long)]
(see cli.rs in that commit).
But on the other hand the first line of this situation a few lines above, does not get spaces around the =:
#[arg(short='d', long="ignore-hidden", action = clap::ArgAction::SetFalse, help=
"Ignore hidden files and directories (starting with a dot). Default is not to ignore them, \
except for the .git directory with the meta data of a git repository.")]
(I fixed some of that situations by hand with another commit.)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reported attribute-formatting examples with the stated rustfmt 1.8.0 version via cargo fmt. Compare the handling of spaces around = in the two snippets and identify the relevant rustfmt formatting path; done means both forms are formatted consistently and the behavior is covered by a regression test.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100