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Eli Zaretskii authored
lisp/info.el (Info-toc-build): If the Info file has no "Up" pointer, don't pass the (nil) value of `upnode' to string-match.
688070a5
lisp/info.el (Info-toc-build): If the Info file has no "Up" pointer, don't pass the (nil) value of `upnode' to string-match.