Don't indent elements when in a <pre>

Fixes #1891

CHANGES

@@ -22,6 +22,9 @@ Release 1.16.1 [PENDING]
   * Bugfix: when pretty-printing, the first inline element in a block would not be wrap-indented if it were preceded by
     a blank text node.
 
+  * Bugfix: when pretty-printing a <pre> containing block tags, those tags were incorrectly indented.
+    <https://github.com/jhy/jsoup/issues/1891>
+
 Release 1.15.4 [18-Feb-2023]
   * Improvement: added the ability to escape CSS selectors (tags, IDs, classes) to match elements that don't follow
     regular CSS syntax. For example, to match by classname <p class="one.two">, use document.select("p.one\\.two");

src/main/java/org/jsoup/nodes/Element.java

@@ -1670,7 +1670,7 @@ public Range endSourceRange() {
     }
 
     boolean shouldIndent(final Document.OutputSettings out) {
-        return out.prettyPrint() && isFormatAsBlock(out) && !isInlineable(out);
+        return out.prettyPrint() && isFormatAsBlock(out) && !isInlineable(out) && !preserveWhitespace(parentNode);
     }
 
     @Override
@@ -1701,7 +1701,8 @@ void outerHtmlHead(final Appendable accum, int depth, final Document.OutputSetti
     void outerHtmlTail(Appendable accum, int depth, Document.OutputSettings out) throws IOException {
         if (!(childNodes.isEmpty() && tag.isSelfClosing())) {
             if (out.prettyPrint() && (!childNodes.isEmpty() && (
-                    tag.formatAsBlock() || (out.outline() && (childNodes.size()>1 || (childNodes.size()==1 && (childNodes.get(0) instanceof Element))))
+                (tag.formatAsBlock() && !preserveWhitespace(parentNode)) ||
+                    (out.outline() && (childNodes.size()>1 || (childNodes.size()==1 && (childNodes.get(0) instanceof Element))))
             )))
                 indent(accum, depth, out);
             accum.append("</").append(tagName()).append('>');

src/test/java/org/jsoup/nodes/ElementTest.java

@@ -157,6 +157,14 @@ public void testKeepsPreTextAtDepth() {
         assertEquals("<pre><code><span><b>code\n\ncode</b></span></code></pre>", doc.body().html());
     }
 
+    @Test void doesNotWrapBlocksInPre() {
+        // https://github.com/jhy/jsoup/issues/1891
+        String h = "<pre><span><foo><div>TEST\n TEST</div></foo></span></pre>";
+        Document doc = Jsoup.parse(h);
+        assertEquals("TEST\n TEST", doc.wholeText());
+        assertEquals(h, doc.body().html());
+    }
+
     @Test
     public void testBrHasSpace() {
         Document doc = Jsoup.parse("<p>Hello<br>there</p>");