info-xref-case-fold

info-xref-case-fold is a variable defined in `info-xref.el'.
Its value is

nil

Documentation:
Non-nil means node checks should ignore case.
When following cross-references, the Emacs Info reader first tries a
case-sensitive match, then if that fails a case-insensitive one.
The standalone Info reader does not do this, nor does this work
for links in the html versions of Texinfo manuals. Therefore
to ensure your cross-references work on the widest range of platforms,
you should set this variable to nil.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.