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<?php echo preg_replace('/(\{.+\})/sU', '<span id="\\1"></span>', 'Qwe {test}, {testie}, {not valid}');
Output for git.master, git.master_jit, rfc.property-hooks
Qwe <span id="{test}"></span>, <span id="{testie}"></span>, <span id="{not valid}"></span>

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