On 2014-07-23 02:20, Herbert Voss wrote:
Am 23.07.2014 03:20, schrieb Rik Kabel:
There appears to be a bug with \startframed. In the following example,
the instance with no optional argument sets correctly, while with the
use of an optional argument (even empty []) a whitespace is introduced
before the text.

     \starttext
     \startframed[]
     Why a space?
     \stopframed
TeX reads "\startframed[] Why a space? \stopframed"
A linebreak is replaced by a space and spaces at the beginning of
a line are ignored by default. Without the optional []
TeX reads "\startframed Why a space? \stopframed"
The first space is "eaten" by TeX while parsing the macro name.

      \startframed[]%   ignore the space
      Why a space?
      \stopframed

It is the same behaviour as for \startframed{} ...

Yes. TeX does read it that way. I have written LaTeX packages and know the issues. ConTeXt, on the other hand, makes an extra effort, at least with the start/stop commands, to do it differently. That is one of the primary benefits, to my mind, of using \starttexdefinition...\stoptexdefinition instead of \def.

Perhaps I am extending my expectation of that improved behavior to \startframed[], but it is not, I think, an unreasonable hope.
     \startframed
     This is ok.
     \stopframed
     \stoptext
This is also not correct, you should use:

      \startframed
      This is ok.%
      \stopframed
      \stoptext

Otherwise you'll get a space after the dot.

In a real document I would likely use \par or a blank line at that point, but I was trying to provide a DWE (demonstrative working example), if not a MWE, to show the issue with the leading space. Line-feed hiding with % does not belong in the content of the document unless one chooses to drop back to TeX instead of writing within the ConTeXt package.
Herbert

--
Rik
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