manyind index unwanted space before comma

Question

I get an unwanted space after every index keyword when using the manyind package.

I don't understand what am I doing wrong since when I try to compile the manyind documentation, the index turns out fine.

MWE (replace manyind by makeidx to see propper behaviour):

\documentclass{book}
\usepackage{lipsum}

\usepackage{manyind}
%\usepackage{makeidx}
\makeindex

\begin{document}
\lipsum[1]\index{abc}
\printindex
\end{document}

See the extra space after the term abc, before comma below.

Answer 1

There is a typo in manyind.sty, basically right at the start within \AtBeginDocument{...}:

 \protected@write
    \@indexfile {}{\string \indexentry
    {\ind@nr#1 }{\thepage}}%
  \endgroup

must be changed to

\protected@write
   \@indexfile {}{\string \indexentry
  {\ind@nr #1}{\thepage}}%
  \endgroup

i.e. the space between \ind@nr and #1 does matter here.

Following code fixes this.

\documentclass{book}
\usepackage{blindtext}

\usepackage{manyind}

\makeatletter

\AtBeginDocument{\def\ind@nr#1{\string\indnr\mindchoice d\gr@bltr#1-\relax b #1}%
\ifx\@@wrindex\undefined
\def\@wrindex#1{\@bsphack 
\protected@write
    \@indexfile {}{\string \indexentry
    {\ind@nr #1}{\thepage}}%
  \endgroup
\@esphack}%
\else
\def\@wrindex#1{\@@wrindex\ind@nr#1||\\}%
\fi
\setindex{main}}%

\makeatother
%\usepackage{makeidx}
\makeindex



\begin{document}
\blindtext[1]\index{abc} \index{cdef}
\printindex
\end{document}