Variable: tab-bar-format-tab-help-text-function
tab-bar-format-tab-help-text-function is a variable defined in
tab-bar.el.gz.
Value
tab-bar-format-tab-help-text-default
Documentation
Function to produce help text for tabs displayed in the tab bar.
This function should accept two arguments: the tab, and the one-based tab's number.
The function should produce a string, which may be propertized. By default, use function `tab-bar-format-tab-help-text-default.
Probably introduced at or before Emacs version 31.1.
Source Code
;; Defined in /usr/src/emacs/lisp/tab-bar.el.gz
(defvar tab-bar-format-tab-help-text-function #'tab-bar-format-tab-help-text-default
"Function to produce help text for tabs displayed in the tab bar.
This function should accept two arguments: the tab, and the one-based
tab's number.
The function should produce a string, which may be propertized. By
default, use function `tab-bar-format-tab-help-text-default.")