Doc test failure (test arrow-avro/src/lib.rs - reader) when verifying avro 56.0.0 RC1 release

[alamb]

Describe the bug

• Part of Release arrow-rs / parquet Major version 56.0.0 (July 2025) #7395

When verifying the 56.0.0

To Reproduce

./dev/release/verify-release-candidate.sh 56.0.0 1

Then it errors like this

 Doc-tests arrow_avro

running 3 tests
test arrow-avro/src/lib.rs - reader (line 67) ... ok
test arrow-avro/src/codec.rs - codec::Codec::with_utf8view (line 402) ... ok
test arrow-avro/src/lib.rs - reader (line 49) ... FAILED

failures:

---- arrow-avro/src/lib.rs - reader (line 49) stdout ----
Test executable failed (exit status: 101).

stderr:

thread 'main' panicked at arrow-avro/src/lib.rs:9:67:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace



failures:
    arrow-avro/src/lib.rs - reader (line 49)

test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.55s

error: doctest failed, to rerun pass `-p arrow-avro --doc`
+ cleanup
+ '[' no = yes ']'
+ echo 'Failed to verify release candidate. See /var/folders/1l/tg68jc6550gg8xqf1hr4mlwr0000gn/T/arrow-56.0.0.XXXXX.wL8TCA6FBQ for details.'
Failed to verify release candidate. See /var/folders/1l/tg68jc6550gg8xqf1hr4mlwr0000gn/T/arrow-56.0.0.XXXXX.wL8TCA6FBQ for details.

Expected behavior

./dev/release/verify-release-candidate.sh 56.0.0 1

Should pass

Additional context

[alamb]

I think this should do it

diff -du -r arrow-avro/src/reader/mod.rs arrow-avro-orig/src/reader/mod.rs
--- arrow-avro/src/reader/mod.rs	2025-07-29 13:02:04
+++ arrow-avro-orig/src/reader/mod.rs	2025-07-29 12:59:36
@@ -34,12 +34,8 @@
 //! # use std::fs::File;
 //! # use std::io::BufReader;
 //! # use arrow_avro::reader::ReaderBuilder;
-//! # let path = "avro/alltypes_plain.avro";
-//! # let path = match std::env::var("ARROW_TEST_DATA") {
-//! #   Ok(dir) => format!("{dir}/{path}"),
-//! #   Err(_) => format!("../testing/data/{path}")
-//! # };
-//! let file = File::open(path).unwrap();
+//!
+//! let file = File::open("../testing/data/avro/alltypes_plain.avro").unwrap();
 //! let mut avro = ReaderBuilder::new().build(BufReader::new(file)).unwrap();
 //! let batch = avro.next().unwrap();
 //! ```

[alamb]

label_issue.py automatically added labels {'arrow'} from #8020