[O] Parsing of todo state log lines

[Michael Brand]

Hi all

There seems to be an inconsistency in parsing. When
org-log-states-order-reversed is nil (which I am new to) and a TODO
with the manually written state log lines

- State "DONE"       from "TODO"       [2018-05-12 Sat]
- State "DONE"       from              [2018-05-13 Sun]
- State "DONE"       from "TODO"       [2018-05-14 Mon]

is changed to DONE the new state log line is expected to go after the
third line but it goes after the first like if the second was missed
by the parser. When the same state log lines are in a habit they are
all recognized for the consistency graph where they appear as a star,
but still the new state log line goes after the first line.

Found in Org release_9.1.13-751-g9dcc522.

Michael