Not just the latest beta ... and indeed according to the TeXbook this should be
a vertical double bar (\Vert), in math mode.
I wish to point out that | in text font (text mode) is different from | in math
font (math mode). I noticed that Preview (on the mac) *fails* to render the
math font $|$
Hi Hans,
With the latest beta there seems a bug has been intoduced with « \| » which
should give a vertical double bar and not a simple bar.
This is a minimal example:
\starttext
With 2019.02.10 17:43, the command \type{\|x\|} gives an incorrect result:
$\|x\| = 1$
$|x| = 1$
\stoptext
Best
