bin/polytexnic in polytexnic-1.6.0 vs bin/polytexnic in polytexnic-1.6.1

@@ -2,30 +2,35 @@
 require "polytexnic"
 require 'optparse'
 require 'fileutils'
 
 # polytexnic command-line script
-# The polytexnic script converts Markdown to LaTeX
+# The polytexnic script converts Markdown to HTML or LaTeX
 # using the PolyTeXnic HTML pipeline.
 
-examples = %(Examples:
-    polytexnic example.md example.tex
-    polytexnic example.md > example.tex
-    polytexnic < example.md > example.tex
-    cat example.md | polytexnic > example.tex
-    polytexnic -f example.md > example.tex
-    polytexnic -f example.md -o example.tex)
+examples = %(
+The polytexnic script converts Markdown to HTML or LaTeX
+using the PolyTeXnic HTML pipeline.
 
+Examples:
+    polytexnic example.md example.html
+    polytexnic example.md > example.html
+    polytexnic < example.md > example.html
+    cat example.md | polytexnic > example.html
+    polytexnic -i example.md > example.html
+    polytexnic -i example.md -o example.tex
+    polytexnic -f tex example.md)
+
 options = {}
 OptionParser.new do |opts|
   opts.banner = "Usage: polytexnic [options]\n#{examples}\n\n"
 
-  opts.on("-i", "--input", "Use file input") do |infile|
+  opts.on("-i", "--input=INPUT", "Use file input") do |infile|
     options[:infile] = infile
   end
 
-  opts.on("-o", "--output", "Use file output") do |outfile|
+  opts.on("-o", "--output=OUTPUT", "Use file output") do |outfile|
     options[:outfile] = outfile
   end
 
   opts.on("-f", "--format", "Use output format [html, tex]") do |format|
     options[:format] = format
@@ -33,20 +38,34 @@
 end.parse!
 
 # Returns the file format based on extension.
 # Should be 'html' or 'tex'.
 def format(filename)
+  puts '***********'
+  puts '***********'
+  puts '***********'
+  puts '***********'
+  puts '***********'
+  p filename.split('.')
   filename.split('.').last
 rescue
   nil
 end
 
+puts '$$$$$$$$$$$'
+puts '$$$$$$$$$$$'
+puts '$$$$$$$$$$$'
+puts '$$$$$$$$$$$'
+puts '$$$$$$$$$$$'
+p options
 if (infile = options[:infile] || ARGV.shift)
+puts infile
   input = File.read(infile)
 else
   input = STDIN.read
 end
 outfile  = options[:outfile] || ARGV.shift
+puts outfile
 pipeline = Polytexnic::Pipeline.new(input, article: true)
 format   = options[:format] || format(outfile) || "html"
 if format == "html"
   output = pipeline.to_html
 elsif format == "tex"