Merge branch 'master' into core-updates

gnu: Add ruby-libxml.

* gnu/packages/ruby.scm (ruby-libxml): New variable.

gnu: Add ruby-shindo.

* gnu/packages/ruby.scm (ruby-shindo): New variable.

gnu: Add ruby-formatador.

* gnu/packages/ruby.scm (ruby-formatador): New variable.

gnu: Add ruby-notiffany.

* gnu/packages/ruby.scm (ruby-notiffany): New variable.

gnu: Add ruby-shellany.

* gnu/packages/ruby.scm (ruby-shellany): New variable.

gnu: Add ruby-nenv.

* gnu/packages/ruby.scm (ruby-nenv): New variable.

gnu: Add ruby-lumberjack.

* gnu/packages/ruby.scm (ruby-lumberjack): New variable.

gnu: Add ruby-docile.

* gnu/packages/ruby.scm (ruby-docile): New variable.

gnu: Add ruby-bio-logger.

* gnu/packages/ruby.scm (ruby-bio-logger): New variable.

gnu: Add ruby-cucumber-core.

* gnu/packages/ruby.scm (ruby-cucumber-core): New variable.

gnu: Add ruby-log4r.

* gnu/packages/ruby.scm (ruby-log4r): New variable.

gnu: Add ruby-gherkin3.

* gnu/packages/ruby.scm (ruby-gherkin3): New variable.

Merge branch 'master' into core-updates

gnu: Add ruby-rack.

* gnu/packages/ruby.scm (ruby-rack): New variable.

gnu: Add ruby-byebug.

* gnu/packages/ruby.scm (ruby-byebug): New variable.

gnu: Add ruby-pg.

* gnu/packages/ruby.scm (ruby-pg): New variable.

Update copyright information in (gnu packages ruby).

gnu: Add ruby-ox.

* gnu/packages/ruby.scm (ruby-ox): New variable.

gnu: Add ruby-activesupport.

* gnu/packages/ruby.scm (ruby-activesupport): New variable.