title: Ghostscript font conversion issue
body: <p>All,</p>
  
  <p>I'm having an issue with a font in a pdf. In the original, it shows a solid line, but if I copy it, I get this <code>ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ</code> on the clipboard. </p>
  
  <p>That indicates to me it is some special font being used, which would be fine. The problem is that I use this pdf as input to ghostscript, and the line become a bunch of boxes with X in them. 
  <img src="https://i.stack.imgur.com/quDLC.png" alt="Line in pdf"></p>
  
  <p><img src="https://i.stack.imgur.com/SK9P4.png" alt="Boxes in pdf"></p>
  
  <p>After some searching, I came across <a href="https://stackoverflow.com/a/2981689">this answer</a>. The <code>-c</code> command successfully removes the boxes, but the line is still missing. </p>
  
  <p>Running <code>gswin64c.exe -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=output.pdf  USA_15238-2897_5853101.pdf</code> on a windows 7 64 bit system, I get the following output:</p>
  
  <pre><code>GPL Ghostscript 9.04 (2011-08-05)
  Copyright (C) 2011 Artifex Software, Inc.  All rights reserved.
  This software comes with NO WARRANTY: see the file PUBLIC for details.
  Processing pages 1 through 2.
  Page 1
  Substituting font Courier-Bold for CourierNew,Bold.
  Loading NimbusMonL-Bold font from %rom%Resource/Font/NimbusMonL-Bold... 3825552 2503053 2085544
   779106 3 done.
  Substituting font Courier for CourierNew.
  Loading NimbusMonL-Regu font from %rom%Resource/Font/NimbusMonL-Regu... 3986304 2660967 2146096
   844377 3 done.
  Can't find (or can't open) font file %rom%Resource/Font/ArialMT.
  Can't find (or can't open) font file ArialMT.
  Can't find (or can't open) font file %rom%Resource/Font/ArialMT.
  Can't find (or can't open) font file ArialMT.
  Querying operating system for font files...
  Didn't find this font on the system!
  Substituting font Helvetica for ArialMT.
  Loading NimbusSanL-Regu font from %rom%Resource/Font/NimbusSanL-Regu... 4100320 2785188 2226832
   918025 3 done.
  Page 2
  Substituting font Courier-Bold for CourierNew,Bold.
  Substituting font Courier for CourierNew.
  </code></pre>
  
  <p>Adding the windows fonts folder as a fontpath switch allows for finding the fonts, <em>but does not fix the line to boxes problem</em>. </p>
  
  <p>Running <code>gswin64c.exe -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=output.pdf -c ".setpdfwrite &lt;&lt;/NeverEmbed [ ]&gt;&gt; setdistillerparams" -f USA_15238-2897_5853101.pdf</code> produces this:</p>
  
  <pre><code>GPL Ghostscript 9.04 (2011-08-05)
  Copyright (C) 2011 Artifex Software, Inc.  All rights reserved.
  This software comes with NO WARRANTY: see the file PUBLIC for details.
  Processing pages 1 through 2.
  Page 1
  Substituting font Courier-Bold for CourierNew,Bold.
  Loading NimbusMonL-Bold font from %rom%Resource/Font/NimbusMonL-Bold... 3825552 2503973 2105728
   793286 3 done.
  Substituting font Courier for CourierNew.
  Loading NimbusMonL-Regu font from %rom%Resource/Font/NimbusMonL-Regu... 3986304 2661903 2166280
   858469 3 done.
  Can't find (or can't open) font file %rom%Resource/Font/ArialMT.
  Can't find (or can't open) font file ArialMT.
  Can't find (or can't open) font file %rom%Resource/Font/ArialMT.
  Can't find (or can't open) font file ArialMT.
  Querying operating system for font files...
  Didn't find this font on the system!
  Substituting font Helvetica for ArialMT.
  Loading NimbusSanL-Regu font from %rom%Resource/Font/NimbusSanL-Regu... 4100320 2786124 2247016
   932205 3 done.
  Page 2
  Substituting font Courier-Bold for CourierNew,Bold.
  Substituting font Courier for CourierNew.
  </code></pre>
  
  <p>But the line is now spaces in the pdf. If I copy and paste it, I get <code>─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─</code>.</p>
  
  <p>What ghostscript switch do I need to add to keep the line from the original pdf?</p>