make sure it doesn't loop infinitely on empty tags

Author: mikesamuel

src/prettify.js

@@ -1308,6 +1308,7 @@ function prettyPrint() {
           // fetch the content as a snippet of properly escaped HTML.
           // Firefox adds newlines at the end.
           var content = cs.innerHTML.replace(/(?:\r\n?|\n)$/, '');
+          if (!content) { continue; }
           if (isRawContent) {
             content = PR_textToHtml(content);
           }

tests/prettify_test.html

@@ -17,23 +17,20 @@ <h1>Bash</h1>
 <pre class="prettyprint" id="bash">#!/bin/bash
 
 # Fibonacci numbers
-# param int n >= 0
-# returns int >= 0
+# Writes an infinite series to stdout, one entry per line
 function fib() {
-  local n=$(( $1 + 0 ))
-  shift
   local a=1
   local b=1
-  while [ "$n" != 0 ] ; do
+  while true ; do
+    echo $a
     local tmp=$a
     a=$(( $a + $b ))
     b=$tmp
-    n=$(( $n - 1 ))
   done
-  echo -n $a
 }
 
-fib 10
+# output the 10th element of the series and halt
+fib | head -10 | tail -1
 </pre>
 
 <h1>C</h1>
@@ -293,6 +290,9 @@ <h1>HTML using XMP</h1>
 </html>
 </xmp>
 
+<h1>Whitespace</h1>
+<pre class=prettyprint id="whitespace"></pre>
+
 </body>
 
 <script type="text/javascript">
@@ -306,28 +306,21 @@ <h1>HTML using XMP</h1>
       '`COM#!/bin/bash`END`PLN<br>' +
       '<br>' +
       '`END`COM# Fibonacci numbers`END`PLN<br>' +
-      '`END`COM# param int n &gt;= 0`END`PLN<br>' +
-      '`END`COM# returns int &gt;= 0`END`PLN<br>' +
+      '`END`COM# Writes an infinite series to stdout, one entry per line`END`PLN<br>' +
       '`END`KWDfunction`END`PLN fib`END`PUN()`END`PLN `END`PUN{`END`PLN<br>' +
-      '&nbsp; local n`END`PUN=`END`PLN$`END`PUN((`END`PLN $1 `END`PUN+' +
-          '`END`PLN `END`LIT0`END`PLN `END`PUN))`END`PLN<br>' +
-      '&nbsp; shift<br>' +
       '&nbsp; local a`END`PUN=`END`LIT1`END`PLN<br>' +
       '&nbsp; local b`END`PUN=`END`LIT1`END`PLN<br>' +
-      '&nbsp; `END`KWDwhile`END`PLN `END`PUN[`END`PLN `END`STR"$n"`END' +
-          '`PLN `END`PUN!=`END`PLN `END`LIT0`END`PLN `END`PUN]`END`PLN `END' +
-          '`PUN;`END`PLN `END`KWDdo`END`PLN<br>' +
+      '&nbsp; `END`KWDwhile`END`PLN `END`KWDtrue`END`PLN `END`PUN;`END`PLN `END`KWDdo`END`PLN<br>' +
+      '&nbsp; &nbsp; echo $a<br>' +
       '&nbsp; &nbsp; local tmp`END`PUN=`END`PLN$a<br>' +
       '&nbsp; &nbsp; a`END`PUN=`END`PLN$`END`PUN((`END`PLN $a `END`PUN+`END' +
           '`PLN $b `END`PUN))`END`PLN<br>' +
       '&nbsp; &nbsp; b`END`PUN=`END`PLN$tmp<br>' +
-      '&nbsp; &nbsp; n`END`PUN=`END`PLN$`END`PUN((`END`PLN $n `END`PUN-`END' +
-          '`PLN `END`LIT1`END`PLN `END`PUN))`END`PLN<br>' +
       '&nbsp; done<br>' +
-      '&nbsp; echo `END`PUN-`END`PLNn $a<br>' +
       '`END`PUN}`END`PLN<br>' +
       '<br>' +
-      'fib `END`LIT10`END'),
+      '`END`COM# output the 10th element of the series and halt`END`PLN<br>' +
+      'fib `END`PUN|`END`PLN head `END`PUN-`END`LIT10`END`PLN `END`PUN|`END`PLN tail `END`PUN-`END`LIT1`END'),
 
   C: (
       '`COM#include &lt;stdio.h&gt;`END`PLN<br>' +
@@ -668,7 +661,8 @@ <h1>HTML using XMP</h1>
       '`END`COM// --&gt;`END`PLN<br>' +
       '&nbsp; &nbsp; `END`END`TAG&lt;/script&gt;`END`PLN<br>' +
       '&nbsp; `END`TAG&lt;/body&gt;`END`PLN<br>' +
-      '`END`TAG&lt;/html&gt;`END')
+      '`END`TAG&lt;/html&gt;`END'),
+  whitespace: ''
 };