possible commandline option improvement

[gccbison]

The commandline option handling maybe
can be improved a little bit:

bison --help shows the comandline options,
for example the output file option:

  -o, --output=FILE          leave output to FILE

When at a typo the option is used as '-output=filename'
then it is parsed as the '-o' option and the generated
filename is 'utput=filename' and this is oke how it is
programmed in getargs.c

Reading the sourcecode it could be made to automagically
interpret it as the '--output=filename' option in such
situation. Something to consider for the todo list.


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