Fix following Info cross-references to anchors

* lisp/info.el (Info-read-subfile): Add to the returned value the
length of subfile preamble, after converting it to file's byte
offset, as expected by the caller.  Use bufferpos-to-filepos.
(Info-find-node-2): If searching for a node with a
1000-character slop fails, try again with a 10000-character slop,
to account for known bugs in Texinfo 5.0 and 5.1.  (Bug#21055)

* lisp/international/mule-util.el (bufferpos-to-filepos): New
function.
* etc/NEWS: Mention bufferpos-to-filepos.

1 files changed, 1 insertions, 1 deletions

diff --git a/etc/NEWS b/etc/NEWS
index e56d498d4fe..07bff641720 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -911,7 +911,7 @@ be updated accordingly.
 
 * Lisp Changes in Emacs 25.1
 
-** New function `filepos-to-bufferpos'.
+** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
 
 ** The default value of `load-read-function' is now `read'.