Add test_class_tokenize_symbol_for_nested_method

Author: aycabta

test/test_rdoc_ruby_lex.rb

@@ -520,6 +520,21 @@ def test_class_tokenize_symbol
     assert_equal expected, tokens
   end
 
+  def test_class_tokenize_symbol_for_nested_method
+    tokens = RDoc::RubyLex.tokenize 'return untrace_var :name', nil
+
+    expected = [
+      @TK::TkRETURN    .new( 0, 1,  0, "return"),
+      @TK::TkSPACE     .new( 6, 1,  6, " "),
+      @TK::TkIDENTIFIER.new( 7, 1,  7, "untrace_var"),
+      @TK::TkSPACE     .new(18, 1, 18, " "),
+      @TK::TkSYMBOL    .new(19, 1, 19, ":name"),
+      @TK::TkNL        .new(24, 1, 24, "\n"),
+    ]
+
+    assert_equal expected, tokens
+  end
+
   def test_unary_minus
     ruby_lex = RDoc::RubyLex.new("-1", nil)
     assert_equal("-1", ruby_lex.token.value)