Recent patches

Patch 8.0.1773
Problem: Dialog messages are not translated.
Solution: Add N_() and _() where needed. (Sergey Alyoshin)
Patch 8.0.1774
Problem: Reading very long lines can be slow.
Solution: Read up to 1 Mbyte at a time to avoid a lot of copying. Add a check for going over the column limit.
Patch 8.0.1775
Problem: MS-Windows: warning for unused variable.
Solution: Move declaration inside #ifdef. (Mike Williams)