[PATCH] tab-line: New tab-line-tab-face-modified face

[Adam Porter]

Hi Juri, et al,

Spending some more time using Emacs 28.0.50 with tab-bar and tab-line, I
found myself missing the ability to look at a tab-line tab and know
whether its buffer is modified (e.g. after using
`xref-query-replace-in-results' on some project buffers).

This patch adds a face for modified, file-backed buffers.  I chose to
inherit from the font-lock-doc-face, as it seems readable and intuitive
with the default theme.  It seems to make the tab-line much more useful,
and more in line with what users will probably expect from having used
other editors' GUIs.

-- 
Thanks,
Adam

0001-lisp-tab-line.el-Add-modified-buffer-face.patch
Description: Patch adding tab-line-tab-face-modified