Repository: rust
Issue: tidy should stop reporting CRs in a file after a while
Labels: A-testsuite,C-feature-request

Because I hadn't cleaned out my workspace, I got a gigantic flood of tidy errors.

Here's a small sample:
```
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:883: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:884: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:885: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:886: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:887: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:888: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:889: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:890: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:891: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:892: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:893: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:894: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:895: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:896: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:897: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\ssse3.rs:898: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:1: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:2: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:3: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:4: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:5: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:6: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:7: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:8: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:9: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:10: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:11: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:12: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:13: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:14: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:15: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:16: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:17: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:17: TODO is deprecated; use FIXME
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:18: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:19: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:20: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:21: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:22: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:23: CR character
tidy error: C:\src\rust\src\stdarch\crates\core_arch\src\x86\tbm.rs:24: CR character
```

It seems like it wouldn't be uncommon for the usual mode here to be for the line endings to be in the wrong order, at which case it failing like this would be expected.

But it's be nice to not get 898 lines of tidy errors for a 898-line file 😆 

Maybe it could just stop looking after the first few, or report a count, or...