🚀 go-pugleaf

This may not be a bug, but rather my misunderstanding
the documentation, but this strikes me as odd....

% grep '\wx\w' foo
finds all occurrences in foo of 'x' flanked by alphanumerics.

% grep '\Wx\W' foo
finds all occurrences in foo of 'x' flanked by non-alphanumerics.

Fine.  So far so good.
Suppose now I want to find all occurrences of 'x'
flanked by non-alphanumerics, but I want the match
on 'x' not to be case-sensitive.  Well, the -i flag
makes grep ignore case difference when comparing strings,
so I try

% grep -i '\Wx\W' foo

But the effect here is that the -i flag makes the '\W'
meta-character non-case-sensitive as well, and I get
all occurrences of x in foo, regardless of the case of x
(which is fine) but also regardless of whether or not
the x (or X) is flanked by non-alphanumerics!

Is this a feature?

--Francois Lang