Fix an int the cycle tag, add extra unit tests, and updated parser switcher:

- Fixed NoMethod error with .peek (using look instead)
  - Add friendlier error message when {% cycle %}

test/integration/tags/cycle_tag_test.rb

@@ -46,18 +46,34 @@ class CycleTagTest < Minitest::Test
     assert_template_result("11", template)
   end
 
+  def test_cycle_tag_without_arguments
+    error = assert_raises(Liquid::SyntaxError) do
+      Template.parse("{% cycle %}")
+    end
+
+    assert_match(/Syntax Error in 'cycle' - Valid syntax: cycle \[name :\] var/, error.message)
+  end
+
   def test_cycle_tag_with_error_mode
     # QuotedFragment is more permissive than what Parser#expression allows.
+    temlate1 = "{% assign 5 = 'b' %}{% cycle .5, .4 %}"
+    temlate2 = "{% cycle .5: 'a', 'b' %}"
+
     [:lax, :strict].each do |mode|
       with_error_mode(mode) do
-        assert_template_result("a", "{% cycle .5: 'a', 'b' %}")
-        assert_template_result("b", "{% assign 5 = 'b' %}{% cycle .5, .4 %}")
+        assert_template_result("b", temlate1)
+        assert_template_result("a", temlate2)
       end
     end
 
     with_error_mode(:rigid) do
-      assert_raises(Liquid::SyntaxError) { Template.parse("{% cycle .5: 'a', 'b' %}") }
-      assert_raises(Liquid::SyntaxError) { Template.parse("{% cycle .5, .4 %}") }
+      error1 = assert_raises(Liquid::SyntaxError) { Template.parse(temlate1) }
+      error2 = assert_raises(Liquid::SyntaxError) { Template.parse(temlate2) }
+
+      expected_error = /Liquid syntax error: \[:dot, "."\] is not a valid expression/
+
+      assert_match(expected_error, error1.message)
+      assert_match(expected_error, error2.message)
     end
   end
 end