Re: [Groff] explicit and implicit spacing in eqn

[Ralph Corderoy]

Hi Ted,

> What I observe (which agrees with you) is:
>
>     $A=B$
>      --> "A = B"
>     $A=-B$
>      --> "A = -B$"
>     $A = - B$
>      --> "A = -B"
>     $A~=~-B$
>      --> "A = - B"

Some more samples that I've been playing with.  Perhaps they'll help;
I'm out of time for now.

    $ for e in '$a=b$' '$a~=~b$' '$a=-b$' '$a~=~-b$' '$a~=~type suppress - b$' 
'$a={-b}$'; do
    >     printf '%s\t' "$e"
    >     eqn -d'$$' <<<"$e" | grep '^\.as1'
    > done |
    > column -s$'\t' -t
    $a=b$                    .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\,b\/\E*[0rfont]
    $a~=~b$                  .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\,b\/\E*[0rfont]
    $a=-b$                   .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\f[R]\,\[mi]\/\fP\,b\/\E*[0rfont]
    $a~=~-b$                 .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\f[R]\,\[mi]\/\fP\h'22M'\,b\/\E*[0rfont]
    $a~=~type suppress - b$  .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\f[R]\,\[mi]\/\fP\,b\/\E*[0rfont]
    $a={-b}$                 .as1 10 
\&\E*[0sfont]\f[I]\s'\En[0ssize]u'\,a\/\h'28M'\f[R]\,\[eq]\/\fP\h'28M'\f[R]\,\[mi]\/\fP\,b\/\E*[0rfont]
    $

Cheers, Ralph.