Improved permeability on pipelines

lib/uplot/command.rb

@@ -37,17 +37,20 @@ module Uplot
     end
 
     def run
-      input_lines = readlines.map(&:chomp)
+      # Sometimes the input file does not end with a newline code.
+      while input = Kernel.gets(nil)
+        input_lines = input.split(/\R/)
         case @ptype
         when 'hist', 'histogram'
-        histogram(input_lines).render
+          histogram(input_lines)
         when 'line', 'lineplot'
-        line(input_lines).render
+          line(input_lines)
         when 'lines'
-        lines(input_lines).render
-      end
+          lines(input_lines)
+        end.render($stderr)
 
-      puts input_lines if @params[:p]
+        print input if @params[:p]
+      end
     end
 
     def histogram(input_lines)