Nondeterministic failure of test_pweave.py

[abukaj]

Regression test of weaving tests/weave/tex/term_test.texw sometimes fails and sometimes passes.

Examplary output:

\begin{verbatim}
for i in range(3):
    print(i)
\end{verbatim}
\begin{verbatim}
0
\end{verbatim}
\begin{verbatim}
1
2
\end{verbatim}

instead of simpler

\begin{verbatim}
for i in range(3):
    print(i)
\end{verbatim}
\begin{verbatim}
0
1
2
\end{verbatim}

[abukaj]

Created a new branch for the issue; it may be reproduced with tests/test_nondeterministicFail.py (a5e2428)

[abukaj]

Fixed