# sed script to remove comments in .tex source files.
# usage:
#     sed -f rmtexcmt.sed < input.tex > output.tex
# so this here is an sed script, not a shell script.

# Copy all lines inside the verbatim-environment without change .
/\\begin{verbatim}/,/\\end{verbatim}/ b

# Delete lines that begin with a series of non-printable characters
# followed by a %-sign.
/^[^!-$&-~]*%/d

#  Delete everything in a line behind and including a percent-sign, if the
#  percent-sign is not preceeded with a backslash. 
#  For example
#     job   \%  here
# is copied to the standard output, whereas
#     job% here
# is reduced to
#     job
# on standard output.
# Remove a % and all material that follows in the same line,
# if it is not preceeded by a backslash and if the percent is not the last
# character in that line
s/\([^\\]\)%.\{1,\}/\1/

# see also: sed(1)
# Richard J. Mathar, Forschungszentrum Rossendorf, 1994-04-17