Re: spurious space after macro expansion in math mode for TeX output

[Vincent Lefevre]

On 2022-11-09 14:17:10 +0100, Vincent Lefevre wrote:
> \input texinfo    @c -*-texinfo-*-
> 
> @tex
> \gdef\texatan{\mathop{\rm atan}}
> @end tex
> 
> @iftex
> @macro atan {T}
> \\mathop{\\rm atan}
> @end macro
> @end iftex
> 
> Spacing test with atan.
> 
> @math{\mathop{\rm atan}(x)}
> 
> @math{\texatan(x)}
> 
> @math{@atan{z}(x)}

Actually, the space after "atan" disappears even without the "z":

@math{@atan{}(x)}

So, in short,

@macro atan

or

@macro atan {}

generates a space after "atan", but not

@macro atan {T}

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)