Changeset 34761 for trunk/tests/phpunit/data/formatting/whole-posts.php

Shortcodes/Formatting: Add PCRE Performance Testing

• Move pattern from wptexturize() into a separate function.
• Move pattern from wp_html_split() into a separate function.
• Beautify code for wp_html_split().
• Remove unnecessary instances of /s modifier in patterns that don't use dots.
• Add tests/phpunit/data/formatting/whole-posts.php for testing larger strings.
• Add function benchmark_pcre_backtracking().
• Add tests for wp_html_split().
• Add tests for wptexturize().
• Add tests for get_shortcode_regex().

Props miqrogroove.
Fixes #34121.