"Record history" is shown, even if hidden with TSConfig
options.showHistory = 0
is not respected in TYPO3\CMS\Backend\Controller\EditDocumentController in the getButtons() method in the making of the buttonbar.
Actually, a "Record History" buttons is being rendered twice but the TSconfig condition is only checked once.
In the first case, a condition only checks if there is any history
and then renders the button.
On line 1400
the condition is checked with the "getNewIconMode" method and respect if it's hidden