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mu4e: add note about overly long header lines
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@ -53,11 +53,13 @@
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(:from . 22)
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(:subject . nil))
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"A list of header fields to show in the headers buffer.
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Each element has the form (HEADER . WIDTH), where HEADER is one
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of the available headers (see `mu4e-header-info') and WIDTH is
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the respective width in characters. A width of `nil' means
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'unrestricted', and this is best reserved for the
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rightmost (last) field."
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Each element has the form (HEADER . WIDTH), where HEADER is one of
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the available headers (see `mu4e-header-info') and WIDTH is the
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respective width in characters. A width of `nil' means
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'unrestricted', and this is best reserved for the rightmost (last)
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field. Note that emacs may become very slow with excessively long
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lines (1000s of characters), so if you regularly get such messages,
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you want to avoid fields with `nil' altogether."
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:type `(repeat (cons (choice ,@(mapcar (lambda (h)
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(list 'const :tag
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(plist-get (cdr h) :help)
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