[MacPorts] #63895: ruby ports: enable parallel builds

[MacPorts]

#63895: ruby ports: enable parallel builds
----------------------+----------------------------
  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.1
Resolution:           |   Keywords:  parallel_build
      Port:  ruby*    |
----------------------+----------------------------

Comment (by Christopher Nielsen <62156882+mascguy@…>):

 In [changeset:"51e0639923b65c5374fcb9ef48b6eda2df4f6f0d/macports-ports"
 51e0639923b65c5374fcb9ef48b6eda2df4f6f0d/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="51e0639923b65c5374fcb9ef48b6eda2df4f6f0d"
 lang/ruby30, ruby27, ruby26: enable parallel build (#12891)

 delete "use_parallel_build no" in Portfile, these versions of ruby allow
 paralell build.

 See: https://trac.macports.org/ticket/63895
 }}}

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Ticket URL: <https://trac.macports.org/ticket/63895#comment:6>
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