[Bug-AUCTeX] AUCTeX is confused by evironment variable in file path

[Andrea Sosso]

The following expression:

\graphicspath{{$HOME/subdir1/subdir2/}}

is confusing for AUCTeX, which treats anything after $ as TeX math mode. 
I had to add a commented $ at the and of the line:

\graphicspath{{$HOME/subdir1/subdir2/}}% $

to get the correct parsing of the lines below.


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 Andrea Sosso

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