Bar within math (amended)

["Lukas/ConTeXt" <lpr.context@email.cz>]

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Hello,

it seems that bar (even with option 'continue=yes') is not rendered in place of '~' within math. See the sample:

----
\definebar[MyBar][color=green,rulethickness=2.8,order=background,offset=1.5,continue=yes]

\starttext
  1 + 2 = \startbar[MyBar]3~kN\stopbar % OK

  $1 + 2 = \startbar[MyBar]3~\text{kN}\stopbar$ % No background behind space

  $1 + 2 = \inframed[frame=off,background=color,backgroundcolor=green,offset=0pt,]{3~\text{kN}}$ % OK!
\stoptext
----

In the sample 'kN' is a unit, which should be separated by space from the result (here: 3);
I am used to put the unit into the math environment and enclose it into \text{...}.

Is there a way to make the bar be rendered in places of blanks within math, too (like if it was inside $ ... $ - as the first line of the sample)?

- Note that I can use \inframed to get background filled fully, but anyway - how about usage of "bar" for this?

Best regards,

Lukas

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\definebar[MyBar][color=green,rulethickness=2.8,order=background,offset=1.5,continue=yes]

\starttext
  1 + 2 = \startbar[MyBar]3~kN\stopbar

  $1 + 2 = \startbar[MyBar]3~\text{kN}\stopbar$

  $1 + 2 = \inframed[frame=off,background=color,backgroundcolor=green,offset=0pt,]{3~\text{kN}}$
\stoptext

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