Bug#723127: latexdiff: MATHBLOCKflalign left due to unnecessary (but correct) double ampersand

[r.ductor]

Package: latexdiff
Version: 1.0.2-1
Severity: normal

Dear Maintainer,

Thanks for this VERY useful program.

A syntactically correct (amsmath for flaalign)
\begin{flalign} \log{{ ...something... }} \end{leftalign}
causes an unwanted MATHBLOCKflalign in the diff file (I'm using latexdiff-vc with git).

The use of {{ instead of { is a leftover of a wrapping deleted command.

I attach:
zm4-oldtmp.tex = a fixed version of the offending command (HEAD^)
zm4.tex = as the previous one +  a new equation with the offending command (HEAD),
zm4diffHEAD^-HEAD.tex = output of latexdiff-vc --git --ps -r HEAD^ -r HEAD --force zm4.tex

regards
ric

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (900, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.10-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages latexdiff depends on:
ii  perl  5.18.1-3

Versions of packages latexdiff recommends:
ii  texlive-latex-base   2012.20120611-5
ii  texlive-latex-extra  2012.20120611-2

Versions of packages latexdiff suggests:
ii  cvs         2:1.12.13+real-11
ii  subversion  1.7.9-1+nmu4

-- no debconf information
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