feedback: Module datetime | Tarantool

<…> is a datetime object; otherwise, false
Return **type:boolean

|
datetime.parse|**('input_string'[, {format, tzoffset}])
Convert an input string w<…>

https://www.tarantool.io/en/doc/latest/reference/reference_lua/datetime/#datetime-parse

Module datetime exports a function parse_date ^1 implemented in #6731, however this function is not documented and there was no mention of it in doc requests.

The function's description:

+    Parse partial ISO-8601 date string
+
+    Accepted formats are:
+
+    Basic      Extended
+    20121224   2012-12-24   Calendar date   (ISO 8601)
+    2012359    2012-359     Ordinal date    (ISO 8601)
+    2012W521   2012-W52-1   Week date       (ISO 8601)
+    2012Q485   2012-Q4-85   Quarter date
+
+    Returns pair of constructed datetime object, and length of string
+    which has been accepted by parser.

Relevant commits

• 3c40366172e3091cb454079cb72b68eff96b8ed3
• 9bc059bb3fd9c7b3ce31ee062224a1f16cf6b5c3

PR comment

https://github.com/tarantool/tarantool/pull/6731#pullrequestreview-850777717