I18N: Add missing translator comments for strings with trailing spaces for 7.1

[itzmekhokan]

This PR adds missing translator comments for translatable strings that include a trailing space after the colon, as part of the WordPress 7.1 I18N string improvements.

Changes

• Added translator comment for the_tags() default prefix (Tags: ) in category-template.php.
• Added translator comments for trackback/pingback moderation email labels (Trackback excerpt: and Pingback excerpt: ) in wp_notify_moderator() within pluggable.php.

These follow the established pattern used in WP_PHPMailer (/* translators: There is a space after the colon. */) so translation tooling (WP-CLI i18n make-pot, Poedit) correctly preserves the trailing space for translators.

Trac ticket: https://core.trac.wordpress.org/ticket/64899

Use of AI Tools

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Props khokansardar, jorbin, sergeybiryukov, audrasjb.

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[SergeyBiryukov]

Thanks for the PR! In these instances, I think we can just move the space out of the translatable string.

[itzmekhokan]

Thanks for the PR! In these instances, I think we can just move the space out of the translatable string.

Thanks for the review, @SergeyBiryukov ! Updated the PR to move the trailing spaces out of the translatable strings in the_tags() and wp_notify_moderator() instead of adding translator comments.

[audrasjb]

This implementation works, but I would personally rather do this with a placeholder:
sprintf( __( 'The string: %s' ), $the_variable )

[Copilot]

Pull request overview

This PR targets WordPress core i18n string handling for labels that end with a colon and a trailing space, aiming to ensure translation tooling preserves the intended whitespace.

Changes:

• Updated the_tags() default prefix construction to avoid a trailing space inside the translatable string.
• Updated wp_notify_moderator() trackback/pingback excerpt label construction similarly.

Reviewed changes

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

File	Description
src/wp-includes/pluggable.php	Adjusts the trackback/pingback excerpt label strings by moving the trailing space outside of __().
src/wp-includes/category-template.php	Adjusts the default the_tags() “Tags:” prefix by moving the trailing space outside of __().

Comments suppressed due to low confidence (1)

src/wp-includes/pluggable.php:2104

• Same issue as the trackback label: changing the msgid from Pingback excerpt: to Pingback excerpt: and concatenating a literal space outside __() will invalidate existing translations and diverges from the WP convention of keeping the trailing space in the translatable string with a translator comment (e.g., src/wp-includes/class-wp-phpmailer.php:51-56).

					$notify_message .= __( 'Pingback excerpt:' ) . ' ' . "\r\n" . $comment_content . "\r\n\r\n";

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