This filter is already documented in core/wp-includes/comment-functions.php
pre_comment_author_email
pre_comment_author_email-
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filter pre_comment_author_nameThis filter is already documented in core/wp-includes/comment-functions.php
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filter grunion_contact_form_form_actionFilter the contact form action URL.
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filter grunion_contact_form_success_messageFilter the message returned after a successful contact form submission.
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filter contact_form_is_spam_akismetFilter the results returned by Akismet for each submitted contact form.
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filter grunion_optimize_tableFilter if the module run OPTIMIZE TABLE on the core WP tables.
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filter jetpack_theme_compat_filesFilter theme compat files. Themes can add their own compat files here if they like. For example: add_filter( ‘jetpack_theme_compat_files’, ‘mytheme_jetpack_compat_file’ ); function mytheme_jetpack_compat_file( $files ) { $files[‘mytheme’] = locate_template( ‘jetpack-compat.php’ ); return $files; }
Jetpack Developer Resources 