(Info-toc): Call Info-mode on intermediate buffer.
(Info-index-nodes): Enclose code in condition-case to catch errors. (Info-index-node): Don't search all index nodes if request is only for the current node and file is not in the cache of index nodes. (Info-mode-map): Bind Info-copy-current-node-name to `w' for consistency with dired-copy-filename-as-kill. Bind `S' to Info-search-case-sensitively. (Info-copy-current-node-name): New arg. With zero prefix arg put the name inside a function call to `info'. Display copied text in the echo area.
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