func (v *View) deindentLine(line buffer.Cursor) {
line.Boffset = 0
if r, _ := line.RuneUnder(); r == '\t' {
v.buf.Delete(line, 1)
}
if v.cursor.Line == line.Line && v.cursor.Boffset > 0 {
cursor := v.cursor
cursor.Boffset -= 1
v.MoveCursorTo(cursor)
}
}
