time.rb: fix parsing time zone in iso8601
* lib/time.rb (Time.xmlschema): a colon in time zone designator
can be omitted. [ruby-core:87277] [Bug #14790]
time.rb: fix parsing time zone in iso8601
* lib/time.rb (Time.xmlschema): the minute in time zone designator
can be omitted together with the preceding colon.
[ruby-core:87277] [Bug #14790]
merge revision(s) 63512,63514: [Backport #14790]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@64148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e