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fix a possible (wrong-type-argument stringp nil) error
* lisp/org-compat.el: Make sure that file-name-directory is getting a stringp. This avoids a possible "(wrong-type-argument stringp nil)" error when the library in question does not exist.
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@ -327,7 +327,7 @@ Works on both Emacs and XEmacs."
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(apply 'propertize string properties)))
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(defmacro org-find-library-dir (library)
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`(file-name-directory (locate-library ,library)))
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`(file-name-directory (or (locate-library ,library) "")))
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(defun org-count-lines (s)
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"How many lines in string S?"
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