+ * Improving heuristics for M$ style TOFU is way tricky. In the end,
+it's just plain guessing what is newly added text and what is quoted,
+in particular with most "modern" MUAs disgustingly trying to invent some
+new way of (not machine-parseable, of course) quoting that makes guessing
+even harder.
+
+ * Block-align lines of text. Same problem as above: It's really hard
+guesswork to figure out what is intentional formatting and what is just
+user laziness. Patches solving this issue are greatly welcome, of course.
+