/*
* mboxro processing:
* - escape lines that start with "From " with a > sign.
- * - be reversable by escaping lines that contain an arbitrary
+ * - be reversible by escaping lines that contain an arbitrary
* number of > signs, followed by "From ", i.e. />*From / in regexp.
* - strict mbox processing only requires escaping after empty lines,
* yet most MUAs seem to relax this requirement and will treat any