Ruby

Upgraded tzdata to 2018c on both my Debian stretch (stable) and jessie
(oldstable) machines via "apt-get dist-upgrade" and noticed test failures:

[ 4/325] TestTimeTZ#test_asia_tokyo = 0.00 s 1) Failure: TestTimeTZ#test_asia_tokyo [$HOME/ruby/test/ruby/test_time_tz.rb:129]: TZ=Asia/Tokyo Time.local(1951, 5, 6, 2, 0, 0). <"1951-05-06 03:00:00 +1000"> expected but was <"1951-05-06 02:00:00 +1000">. [ 62/325] TestTimeTZ#test_gen_Asia_Tokyo_24 = 0.00 s 2) Failure: TestTimeTZ#test_gen_Asia_Tokyo_24 [$HOME/ruby/test/ruby/test_time_tz.rb:259]: TZ=Asia/Tokyo Time.utc(1951, 5, 5, 16, 59, 59).localtime. <"1951-05-06 01:59:59 +0900"> expected but was <"1951-05-06 02:59:59 +1000">. [ 65/325] TestTimeTZ#test_gen_Asia_Tokyo_27 = 0.00 s 3) Failure: TestTimeTZ#test_gen_Asia_Tokyo_27 [$HOME/ruby/test/ruby/test_time_tz.rb:259]: TZ=Asia/Tokyo Time.utc(1951, 9, 7, 16, 0, 0).localtime. <"1951-09-08 01:00:00 +0900"> expected but was <"1951-09-08 02:00:00 +1000">. [ 66/325] TestTimeTZ#test_gen_Asia_Tokyo_69 = 0.00 s 4) Failure: TestTimeTZ#test_gen_Asia_Tokyo_69 [$HOME/ruby/test/ruby/test_time_tz.rb:277]: TZ=Asia/Tokyo Time.local(1951, 5, 6, 1, 59, 59). <"1951-05-06 01:59:59 +0900"> expected but was <"1951-05-06 01:59:59 +1000">. [ 69/325] TestTimeTZ#test_gen_Asia_Tokyo_72 = 0.00 s 5) Failure: TestTimeTZ#test_gen_Asia_Tokyo_72 [$HOME/ruby/test/ruby/test_time_tz.rb:295]: TZ=Asia/Tokyo Time.local(0, 0, 1, 8, 9, 1951, nil, nil, false, nil). <"1951-09-08 01:00:00 +0900"> expected but was <"1951-09-08 01:00:00 +1000">. 

Not an expert on TZ so I'll let somebody else deal with this. Thanks.