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* doc/lispref/display.texi (Defining Faces): Say a face can't be undefined.

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Alan Mackenzie 2019-07-22 14:57:41 +00:00
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doc/lispref/display.texi
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@ -2476,6 +2476,11 @@ face name. In the vast majority of cases, this is not necessary; the
usual procedure is to define a face with @code{defface}, and then use
its name directly.
@cindex face (non-removability of)
Note that once you have defined a face (usually with @code{defface}),
you cannot later undefine this face safely, except by restarting
Emacs.
@defmac defface face spec doc [keyword value]@dots{}
This macro declares @var{face} as a named face whose default face spec
is given by @var{spec}. You should not quote the symbol @var{face},