🚀 go-pugleaf

In article <dak.712929976@kaa> dak@kaa.informatik.rwth-aachen.de (David Kastrup) writes:

   maarel@cwi.nl (E. v.d. Maarel) writes:

   >Hi,

   >Here's something I don't understand:
   >I use \newenvironment to define an environment which
   >makes subequations numbers, like in < 1.2a--1.3b >.
   >It is similar to the thing defined in subeqn.sty,
   >however I tried to make it based on LaTeX's way of
   >defining things.
   >The thing is that right behind closing the equations with
   >\end{subequations}, ther is a little extra space inserted, so
   >the next line f text is not flush the left margin.
   >This space is typically about 3pt.
   >Try the attached example.
   >Applying % behind the \end{subequations} solves the problem.
   >I just want to (try to) understand what is happening.

   >Anybody any idea?

   >Thanks,
   >--Eric

   >-BEGIN EXAMPLE--------------------------------------------------------
   >\documentstyle{article}

   >\newfont{\Bbb}{msbm10}
   >\newcommand{\RR}{\mbox{\Bbb R}}

   >%subequations environment
   >\newcounter{saveequation}
   >\newenvironment{subequations}{
   >  \refstepcounter{equation}
   >  \setcounter{saveequation}{\value{equation}}
   >  \setcounter{equation}{0}
   >  \renewcommand{\theequation}{
   >    \thesection.\thesaveequation\alph{equation}
   >  }
   >}{
   >  \setcounter{equation}{\value{saveequation}}%
   >}
   I wonder that your problem seems comparatively small.
   Whenever after a } you have a newline, or a space, TeX inserts a space
   token. So the lines above should be ended almost all by %. Why they work,
   I don't know.

   Ok, but your problem might be solved by giving \ignorespaces as the last
   command of your closing environment, so that at least a~space following
   the closing } of the environment will be ignored.

No that weon't work. You have to include

   \global\@ignoretrue

in the end part of your environment.
--

   Rainer Schoepf
   Konrad-Zuse-Zentrum                       ,,Ich mag es nicht, wenn
    fuer Informationstechnik Berlin            sich die Dinge so frueh
   Heilbronner Strasse 10                      am Morgen schon so
   W-1000 Berlin 31                            dynamisch entwickeln!''
   Federal Republic of Germany
   <Schoepf@sc.ZIB-Berlin.de> or <Schoepf@sc.ZIB-Berlin.dbp.de>