Bump the previous "max_page_size" limit from 400 kB to 4 MB.

diffoscope/config.py

@@ -49,7 +49,7 @@ class Config:
         self.max_diff_block_lines = defaultint(2 ** 10)  # 1024 lines
         # structural limits, restricts single-file formats
         # semi-restricts multi-file formats
-        self.max_page_size = defaultint(400 * 2 ** 10)  # 400 kB
+        self.max_page_size = defaultint(40 * 2 ** 20)  # 4 MB
         self.max_page_size_child = defaultint(200 * 2 ** 10)  # 200 kB
         self.max_page_diff_block_lines = defaultint(2 ** 7)  # 128 lines