Strip HTML tags from multisite user signup validation errors

[Copilot]

wpmu_validate_user_signup() returns error messages with embedded HTML (e.g. <strong>Error:</strong> This email address is already registered. <a href="...">Log in</a>), which WP-CLI displayed verbatim — leaking markup into the terminal output.

Changes

• User_Command::create() — apply wp_strip_all_tags() to each message from the WP_Error before passing to WP_CLI::error()
• User_Command::import_csv() — same treatment before passing to WP_CLI::warning()
• features/user.feature — new multisite scenario asserting the duplicate-email error is plain text and contains no < characters

Before:

Error: <strong>Error:</strong> This email address is already registered. <a href="http://example.com/wp-login.php">Log in</a> with this address or choose another one.

After:

Error: This email address is already registered.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Improve message in error trying to create user with existing email in multisite</issue_title>
<issue_description>## Bug Report

• [✓] Yes, I reviewed the contribution guidelines.
• [✓] Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

Describe the current, buggy behavior

When I try to create user in multisite with existing email address:

wp user create admin1 admin1@gmail.com --role=administrator

Error: <strong>Error:</strong> This email address is already registered. <a href="http://bahu.local/wp-login.php">Log in</a> with this address or choose another one.

Describe what you would expect as the correct outcome

Error: This email address is already registered.

Let us know what environment you are running this on

OS:     Darwin 22.6.0 Darwin Kernel Version 22.6.0: Tue Nov  7 21:48:06 PST 2023; root:xnu-8796.141.3.702.9~2/RELEASE_X86_64 x86_64
Shell:  /bin/zsh
PHP binary:     /usr/local/Cellar/php@8.2/8.2.15/bin/php
PHP version:    8.2.15
php.ini used:   /usr/local/etc/php/8.2/php.ini
MySQL binary:   /usr/local/bin/mysql
MySQL version:  mysql  Ver 8.3.0 for macos13.6 on x86_64 (Homebrew)
SQL modes:
WP-CLI root dir:        phar://wp-cli.phar/vendor/wp-cli/wp-cli
WP-CLI vendor dir:      phar://wp-cli.phar/vendor
WP_CLI phar path:       /Users/nilambarsharma/Sites/bahu
WP-CLI packages dir:    /Users/nilambarsharma/.wp-cli/packages/
WP-CLI cache dir:       /Users/nilambarsharma/.wp-cli/cache
WP-CLI global config:
WP-CLI project config:  /Users/nilambarsharma/Sites/bahu/wp-cli.local.yml
WP-CLI version: 2.10.0

</issue_description>

Comments on the Issue (you are @copilot in this section)

@danielbachhuber Seems like a reasonable enhancement 👍

• Fixes Improve message in error trying to create user with existing email in multisite #472

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Codecov Report

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[Copilot]

Pull request overview

This PR improves WP-CLI multisite user creation/import UX by sanitizing HTML markup returned by wpmu_validate_user_signup() so terminal output stays plain text.

Changes:

• Strip HTML tags from multisite signup validation error messages in wp user create.
• Strip HTML tags from multisite signup validation warnings in wp user import-csv.
• Add Behat coverage asserting duplicate-email errors contain no < characters (with version-specific expectations).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/User_Command.php	Sanitizes WP_Error messages from multisite signup validation before emitting errors/warnings.
features/user.feature	Adds multisite scenarios ensuring duplicate-email validation output is plain text (no markup).

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