SaiFicSkillTableのcommand_patternがRuby依存にならないように

lib/bcdice/dice_table/sai_fic_skill_table.rb

@@ -77,7 +77,7 @@ def roll_skill(randomizer)
       end
 
       def prefixes
-        ([/RTT[1-6]?/i, "RCT", @rtt, @rct] + @rttn).compact
+        (["RTT[1-6]?", "RCT", @rtt, @rct] + @rttn).compact
       end
 
       private

test/test_sai_fic_skill_table.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require "test/unit"
+require "bcdice"
+require "bcdice/dice_table/sai_fic_skill_table"
+
+class TestSaiFicSkillTable < Test::Unit::TestCase
+  class DummySystem < BCDice::Base
+    table = BCDice::DiceTable::SaiFicSkillTable.new([])
+
+    register_prefix(table.prefixes)
+  end
+
+  def test_command_pattern
+    assert_equal(/^S?([+\-\dD(]+|\d+B\d+|C|choice|D66|(repeat|rep|x)\d+|\d+R\d+|\d+U\d+|BCDiceVersion|RTT[1-6]?|RCT)/i, DummySystem.command_pattern)
+  end
+end