tests/: added test for #3594.

Author: julian-smith-artifex-com

tests/resources/test_3594.pdf

@@ -314,3 +314,18 @@ def llen(texts):
 
     if _stats:
         pymupdf._log_items_clear()
+
+
+def test_3594():
+    print()
+    d = pymupdf.open(os.path.abspath(f'{__file__}/../../tests/resources/test_3594.pdf'))
+    for i, p in enumerate(d.pages()):
+        text = p.get_text()
+        print('='*40)
+        print(f'Page {i}:')
+        for line in text.split('\n'):
+            print(f'    {line!r}')
+    if pymupdf.mupdf_version_tuple < (1, 24, 3):
+        # We expect MuPDF warnings.
+        wt = pymupdf.TOOLS.mupdf_warnings()
+        assert wt