Fix Ptest for Cython.

[AkarshHCL]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

What does the PR accomplish, why was it needed?

The Cython test suite was failing during %check due to a code formatting violation reported by the upstream style checker (TestCodeFormat). The failure specifically originated from a flake8 error:

E502: redundant backslash between brackets
File affected: Cython/Build/IpythonMagic.py

This issue is purely a style/linting problem and does not impact build correctness or runtime functionality. However, since the upstream test suite enforces formatting checks, it caused the overall test execution to fail.
To resolve this we applied a targeted in-place fix during the %check phase using a sed command. This removes trailing backslashes from affected lines, eliminating the E502 violation

Change Log

• SPECS/Cython/Cython.spec

Does this affect the toolchain?

Yes

Test Methodology

• Successful Build Screenshot-

[Kanishk-Bansal]

Buddy Build

[AkarshHCL]

Buddy build is successful .It had license warnings which I have resolved now.

[Kanishk-Bansal]

Buddy Build

[AkarshHCL]

Buddy build is successful with no license warnings.

[Kanishk-Bansal]

Overly broad sed — sed -i '/\$/s/\$//' Cython/Build/IpythonMagic.py strips the trailing backslash from every line ending in , not only the E502 (redundant-backslash-between-brackets) cases. Legitimate Python line continuations elsewhere in the file would also be silently rewritten.

just change in IpythonMagic.py using a patch

[AkarshHCL]

Added a patch instead of sed command.

[Kanishk-Bansal]

Buddy Build

[AkarshHCL]

Buddy Build is successful.

[Kanishk-Bansal]

LGTM, The broad sed -i '/\$/s/\$//' was replaced with a patch

[kgodara912]

Minor line ending fix in test. Buddy build is successful. LGTM.