write_excel in rbbt-util-5.36.0

- old
+ new

@@ -52,11 +52,12 @@
 
 tsvfile, excelfile = ARGV
 
 excelfile, tsvfile = tsvfile, nil if excelfile.nil? and tsvfile =~ /\.(xls|xlsx)$/
 
-raise ParameterException, "No files given" if tsvfile.nil? and excelfile.nil?
-raise ParameterException, "No excel file given" if excelfile.nil?
+raise ParameterException, "No TSV file given" if tsvfile.nil?
+
+excelfile = tsvfile.sub(/\.tsv(\.gz)?$/, '.xlsx') if excelfile.nil?
 
 require 'rbbt/tsv/excel'
 TSV.open(tsvfile, options).excel(excelfile, options)
 