Fixes #10

render50

@@ -359,6 +359,11 @@ def concatenate(output, inputs):
         # Leftmost page
         left = copy(readers[0].pages[i]) if i < len(readers[0].pages) else copy(page)
 
+        # Rotate page
+        # https://github.com/py-pdf/pypdf/issues/2139#issuecomment-1702462468
+        # https://stackoverflow.com/a/75646585
+        left.transfer_rotation_to_content()
+
         # Rightmost pages
         for reader in readers[1:]:
             right = copy(reader.pages[i]) if i < len(reader.pages) else copy(page)

setup.py

@@ -10,13 +10,13 @@
         "Topic :: Utilities"
     ],
     description="This is render50, with which you can render source code as PDFs.",
-    install_requires=["backports.shutil_get_terminal_size", "backports.shutil_which", "braceexpand", "beautifulsoup4", "natsort", "Pygments>=2.7.1", "pypdf==3.17.0", "requests", "six>=1.10.0", "termcolor", "WeasyPrint"],
+    install_requires=["backports.shutil_get_terminal_size", "backports.shutil_which", "braceexpand", "beautifulsoup4", "natsort", "Pygments>=2.7.1", "pypdf>=3.17.1", "requests", "six>=1.10.0", "termcolor", "WeasyPrint"],
     keywords=["render", "render50"],
     license="GPLv3",
     long_description_content_type="text/markdown",
     name="render50",
     python_requires=">=3.9",
     scripts=["render50"],
     url="https://github.com/cs50/render50",
-    version="9.2.6"
+    version="9.2.7"
 )