Fixes related to face underlining
* lisp/faces.el (face-underline-p): Doc fix. Handle :underline being things other than `t' (a string, a list). (face-inverse-video-p): Doc fix. (set-face-underline): Rename it back from set-face-underline-p. Doc fix. Allow interactive input of values other than t. (read-face-attribute): Apply formatting to :underline, since like :box and :stipple it can take list values. * doc/lispref/display.texi (Face Attributes): Fix :underline COLOR description. (Attribute Functions): Update for set-face-underline rename. Tweak descriptions of face-underline-p, face-inverse-video-p. * etc/NEWS: Related edit.
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