Fix parsing from address with special chars

[ecarreras]

This pull request introduces a new utility function, normalize_display_address, to handle email address normalization, ensuring display names are properly quoted when necessary. It also updates the from_ method in the Email class to use this normalization function, adds corresponding test cases, and includes new fixtures for testing. Below are the key changes:

New functionality for email address normalization:

• Added the normalize_display_address function in qreu/address.py to ensure display names in email addresses are quoted if they contain special characters, such as commas or semicolons.
• Updated the from_ method in qreu/email.py to apply the normalize_display_address function to the "From" header before parsing.

Unit tests for normalization:

• Added test cases in spec/address_spec.py to validate the behavior of normalize_display_address, covering scenarios like unquoted display names, already quoted names, and addresses without display names or angle brackets.
• Updated spec/qreu_spec.py to include tests for parsing emails with normalized display names and accented characters.

Test fixtures:

• Added new email fixtures (spec/fixtures/7.txt and spec/fixtures/8.txt) to test parsing of display names with accents and encoded characters. [1] [2]
• Adjusted the test suite in spec/qreu_spec.py to load the new fixtures.

[Copilot]

Pull Request Overview

This pull request fixes email address parsing when display names contain special characters like commas or semicolons by introducing proper quoting normalization before parsing.

• Adds a new normalize_display_address utility function to handle proper quoting of display names containing special characters
• Updates the Email.from_ property to use the normalization function before parsing addresses
• Includes comprehensive test coverage for the new functionality with various edge cases and character encodings

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
qreu/address.py	Adds the normalize_display_address function with proper UTF-8 handling and quoting logic
qreu/email.py	Updates from_ property to apply address normalization before parsing
spec/address_spec.py	Adds comprehensive unit tests for the new normalization function
spec/qreu_spec.py	Updates test suite to include new fixtures and adds integration tests
spec/fixtures/7.txt	New test fixture with quoted display name containing accents and comma
spec/fixtures/8.txt	New test fixture with encoded display name containing special characters