[DRE-maint] Bug#788694: ruby-liquid: FTBFS with TZ=UTC-14: test_date fails

[Chris West (Faux)]

Package: ruby-liquid
Severity: normal

Dear Maintainer,

If you run the build in weird timezones, a date-related test fails.  This normally occurs due to dodgy date maths around midnight.

[213/332] StandardFiltersTest#test_date = 0.00 s                                                                
  1) Failure:
StandardFiltersTest#test_date [/home/faux/ruby-liquid-2.6.1/test/liquid/standard_filter_test.rb:160]:
<"07/05/2006"> expected but was
<"07/06/2006">.


This is causing the package to fail to build on the Reproducible Builds builders:
https://reproducible.debian.net/rb-pkg/unstable/amd64/ruby-liquid.html

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.19.0-20-generic (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)