One liner solution:
perl -anlF[^\\w\\.\-]+ -e 'next unless @F;shift @F;next if $F[0]=~/--
+/;;print join(",",@F)' testdata1.txt
check "perl --help" to review options used.
Interchange Single and double quotes, if you want to run under Window$ . (Not sure if it will require the "\\" escape under Windows.)
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