bug#13190: [PATCH] Help xref truncates info navigation stack, and displays info in too many windows

[Kelly Dean]

On 24.2, emacs -Q
M-x split-window C-h r
Follow any link, then follow another one, then do Info-history-back twice. Then 
you could return to the other nodes again using Info-history-forward, but don't 
do that yet.
Do C-h f visited-file-modtime RET, then click the link in the help page for the 
info node.
Two problems: it opens the info page in both windows, and it truncates the 
navigation stack, so Info-history-forward won't return you to the other nodes 
you were visiting. You can still use Info-history to see the nodes you were 
visiting, but it's distracting to have to do that.
The attached helpinfobug.patch fixes both problems by creating a new info 
buffer rather than reusing an existing one. I think this is the simplest 
solution, though maybe it'd be better to search all info buffers for one which 
is already displaying the target node, and switch to one if found, so if you 
repeatedly follow the same info link from a help page, you'll get no more than 
one new info buffer, rather than multiple new ones.

helpinfobug.patch
Description: Text Data