wrong auto-indent following a one-liner `if true: discard`

[timotheecour]

@Varriount

proc main() =
  if true: discard
  else
main()

after typiing : right after else nimlime removes indentation of else as follows:

proc main() =
  if true: discard
else:
main()

KEY BUG nimlime indent D20190620T173650:here

note: the auto-indent seems to work if the if statement is not a one-liner