77fabb78e0
Margins always use the window, never the buffer; the exception is
`\e[+r` which will remove the margins ('\e[r' will set the margins to
the window). With the margins set, the window will not scroll when the
cursor is at the bottom, outside of the margins. In this case, the
display is not quite right, since I copy the line from another buffer,
rather than actually overwrite the existing line.
ANSICON 
ANSICON provides ANSI escape sequences for Windows console programs. It
provides much the same functionality as ANSI.SYS does for MS-DOS.
Requirements
- 32-bit: Windows 2000 Professional and later (it won't work with NT or 9X).
- 64-bit: AMD64 (it won't work with IA64).