Add pdf file to 1987/heckbert

To prevent a possible 404 in the future the file
1987/heckbert/FoldSpindleMutilate.pdf was added as it is part of the
judges' remarks.

1987/heckbert/.entry.json

@@ -41,6 +41,14 @@
 	    "display_via_github" : true,
 	    "entry_text" : "script to try entry"
 	},
+	{
+	    "file_path" : "FoldSpindleMutilate.pdf",
+	    "inventory_order" : 125,
+	    "OK_to_edit" : false,
+	    "display_as" : "pdf",
+	    "display_via_github" : false,
+	    "entry_text" : "cultural history of the punch card"
+	},
 	{
 	    "file_path" : "1987_heckbert.tar.bz2",
 	    "inventory_order" : 1415926535,

1987/heckbert/README.md

@@ -33,11 +33,11 @@ Folding at the wrong length may be equivalent to a "Spindle or Mutilate" operati
 ```
 
 Try not to
-[Fold, Spindle or Mutilate](https://repository.library.brown.edu/studio/item/bdr:788264/PDF/)
+[Fold, Spindle or Mutilate](FoldSpindleMutilate.pdf)
 files. :-)
 
 The judges used this program to fold up very long lines which the
-BSD fold(1) was unable to process. This program has been added to
+BSD `fold(1)` was unable to process. This program has been added to
 the contest tool chest.
 
 

1987/heckbert/index.html

@@ -414,10 +414,10 @@ To compile on a 16 bit machine, change 300000 to 30000.</p>
 <p>Folding at the wrong length may be equivalent to a “Spindle or Mutilate” operation. For example:</p>
 <pre><code>    ./heckbert 40 &lt; heckbert.c &gt; ph.c ; make ph ; ./ph 20 &lt; heckbert.c &gt; bar.c ; make bar</code></pre>
 <p>Try not to
-<a href="https://repository.library.brown.edu/studio/item/bdr:788264/PDF/">Fold, Spindle or Mutilate</a>
+<a href="FoldSpindleMutilate.pdf">Fold, Spindle or Mutilate</a>
 files. :-)</p>
 <p>The judges used this program to fold up very long lines which the
-BSD fold(1) was unable to process. This program has been added to
+BSD <code>fold(1)</code> was unable to process. This program has been added to
 the contest tool chest.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <p>No remarks were provided by the author.</p>
@@ -450,6 +450,7 @@ the contest tool chest.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1987/heckbert/Makefile">Makefile</a> - entry Makefile</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1987/heckbert/heckbert.orig.c">heckbert.orig.c</a> - original source code</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1987/heckbert/try.sh">try.sh</a> - script to try entry</li>
+<li><a href="FoldSpindleMutilate.pdf">FoldSpindleMutilate.pdf</a> - cultural history of the punch card</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>