Cleanup minitest deprecation warnings about assert_nil

test/test_rdoc_any_method.rb

@@ -133,7 +133,7 @@ def test_marshal_dump
     assert_equal 'Klass#method', loaded.full_name
     assert_equal 'method',       loaded.name
     assert_equal 'param',        loaded.params
-    assert_equal nil,            loaded.singleton # defaults to nil
+    assert_nil                   loaded.singleton # defaults to nil
     assert_equal :public,        loaded.visibility
     assert_equal cm,             loaded.parent
     assert_equal section,        loaded.section
@@ -220,9 +220,9 @@ def test_marshal_load_version_0
     assert_equal 'Klass#method', loaded.full_name
     assert_equal 'method',       loaded.name
     assert_equal 'param',        loaded.params
-    assert_equal nil,            loaded.singleton # defaults to nil
+    assert_nil                   loaded.singleton # defaults to nil
     assert_equal :public,        loaded.visibility
-    assert_equal nil,            loaded.file
+    assert_nil                   loaded.file
     assert_equal cm,             loaded.parent
     assert_equal section,        loaded.section
     assert_nil                   loaded.is_alias_for
@@ -277,7 +277,7 @@ def test_marshal_dump_version_2
     assert_equal 'Klass#method', loaded.full_name
     assert_equal 'method',       loaded.name
     assert_equal 'param',        loaded.params
-    assert_equal nil,            loaded.singleton # defaults to nil
+    assert_nil                   loaded.singleton # defaults to nil
     assert_equal :public,        loaded.visibility
     assert_equal cm,             loaded.parent
     assert_equal section,        loaded.section
@@ -480,4 +480,3 @@ def test_superclass_method_multilevel
   end
 
 end
-

test/test_rdoc_attr.rb

@@ -139,7 +139,7 @@ def test_marshal_load_version_1
     assert_equal cm,           loaded.parent
     assert_equal section,      loaded.section
 
-    assert loaded.display?
+    assert                     loaded.display?
   end
 
   def test_marshal_load_version_2
@@ -188,4 +188,3 @@ def test_type
   end
 
 end
-

test/test_rdoc_code_object.rb

@@ -213,7 +213,7 @@ def test_each_parent
   end
 
   def test_file_name
-    assert_equal nil, @co.file_name
+    assert_nil @co.file_name
 
     @co.record_location @store.add_file 'lib/file.rb'
 

test/test_rdoc_comment.rb

@@ -77,7 +77,7 @@ def test_extract_call_seq_commented
 
     comment.extract_call_seq m
 
-    assert_equal nil, m.call_seq
+    assert_nil m.call_seq
   end
 
   def test_extract_call_seq_no_blank

test/test_rdoc_constant.rb

@@ -118,7 +118,7 @@ def test_marshal_load
     assert_equal cm,             loaded.parent
     assert_equal section,        loaded.section
 
-    assert loaded.display?
+    assert                       loaded.display?
   end
 
   def test_marshal_load_version_0

test/test_rdoc_context.rb

@@ -14,10 +14,10 @@ def test_initialize
     assert_empty @context.in_files
     assert_equal 'unknown', @context.name
     assert_equal '', @context.comment
-    assert_equal nil, @context.parent
+    assert_nil   @context.parent
     assert_equal :public, @context.visibility
     assert_equal 1, @context.sections.length
-    assert_equal nil, @context.temporary_section
+    assert_nil   @context.temporary_section
 
     assert_empty @context.classes_hash
     assert_empty @context.modules_hash
@@ -514,39 +514,39 @@ def test_each_section_enumerator
   end
 
   def test_find_attribute_named
-    assert_equal nil,  @c1.find_attribute_named('none')
+    assert_nil         @c1.find_attribute_named('none')
     assert_equal 'R',  @c1.find_attribute_named('attr').rw
     assert_equal 'R',  @c1.find_attribute_named('attr_reader').rw
     assert_equal 'W',  @c1.find_attribute_named('attr_writer').rw
     assert_equal 'RW', @c1.find_attribute_named('attr_accessor').rw
   end
 
   def test_find_class_method_named
-    assert_equal nil, @c1.find_class_method_named('none')
+    assert_nil @c1.find_class_method_named('none')
 
     m = @c1.find_class_method_named('m')
     assert_instance_of RDoc::AnyMethod, m
     assert m.singleton
   end
 
   def test_find_constant_named
-    assert_equal nil,      @c1.find_constant_named('NONE')
+    assert_nil             @c1.find_constant_named('NONE')
     assert_equal ':const', @c1.find_constant_named('CONST').value
   end
 
   def test_find_enclosing_module_named
-    assert_equal nil, @c2_c3.find_enclosing_module_named('NONE')
+    assert_nil        @c2_c3.find_enclosing_module_named('NONE')
     assert_equal @c1, @c2_c3.find_enclosing_module_named('C1')
     assert_equal @c2, @c2_c3.find_enclosing_module_named('C2')
   end
 
   def test_find_file_named
-    assert_equal nil,        @c1.find_file_named('nonexistent.rb')
+    assert_nil               @c1.find_file_named('nonexistent.rb')
     assert_equal @xref_data, @c1.find_file_named(@file_name)
   end
 
   def test_find_instance_method_named
-    assert_equal nil, @c1.find_instance_method_named('none')
+    assert_nil @c1.find_instance_method_named('none')
 
     m = @c1.find_instance_method_named('m')
     assert_instance_of RDoc::AnyMethod, m

test/test_rdoc_encoding.rb

@@ -159,17 +159,17 @@ def test_class_set_encoding_bad
     s = ""
     encoding = RDoc::Encoding.detect_encoding s
 
-    assert_equal nil, encoding
+    assert_nil encoding
 
     s = "# vim:set fileencoding=utf-8:\n"
     encoding = RDoc::Encoding.detect_encoding s
 
-    assert_equal nil, encoding
+    assert_nil encoding
 
     s = "# vim:set fileencoding=utf-8:\n"
     encoding = RDoc::Encoding.detect_encoding s
 
-    assert_equal nil, encoding
+    assert_nil encoding
 
     assert_raises ArgumentError do
       s = RDoc::Encoding.detect_encoding "# -*- encoding: undecided -*-\n"

test/test_rdoc_markup_formatter.rb

@@ -111,39 +111,39 @@ def test_parse_url
 
     assert_equal 'http',        scheme
     assert_equal 'example/foo', url
-    assert_equal nil,           id
+    assert_nil   id
   end
 
   def test_parse_url_anchor
     scheme, url, id = @to.parse_url '#foottext-1'
 
-    assert_equal nil,           scheme
+    assert_nil   scheme
     assert_equal '#foottext-1', url
-    assert_equal nil,           id
+    assert_nil   id
   end
 
   def test_parse_url_link
     scheme, url, id = @to.parse_url 'link:README.txt'
 
     assert_equal 'link',       scheme
     assert_equal 'README.txt', url
-    assert_equal nil,          id
+    assert_nil   id
   end
 
   def test_parse_url_link_id
     scheme, url, id = @to.parse_url 'link:README.txt#label-foo'
 
     assert_equal 'link',                 scheme
     assert_equal 'README.txt#label-foo', url
-    assert_equal nil,                    id
+    assert_nil   id
   end
 
   def test_parse_url_rdoc_label
     scheme, url, id = @to.parse_url 'rdoc-label:foo'
 
     assert_equal 'link', scheme
     assert_equal '#foo', url
-    assert_equal nil,    id
+    assert_nil   id
 
     scheme, url, id = @to.parse_url 'rdoc-label:foo:bar'
 
@@ -157,13 +157,13 @@ def test_parse_url_scheme
 
     assert_equal 'http',               scheme
     assert_equal 'http://example/foo', url
-    assert_equal nil,                  id
+    assert_nil   id
 
     scheme, url, id = @to.parse_url 'https://example/foo'
 
     assert_equal 'https',               scheme
     assert_equal 'https://example/foo', url
-    assert_equal nil,                   id
+    assert_nil   id
   end
 
   def test_convert_tt_special
@@ -173,4 +173,3 @@ def test_convert_tt_special
   end
 
 end
-

test/test_rdoc_markup_parser.rb

@@ -1068,7 +1068,7 @@ def test_skip
 
     assert_equal [:NEWLINE, "\n", 9, 0], parser.peek_token
 
-    assert_equal nil, parser.skip(:NONE, false)
+    assert_nil parser.skip(:NONE, false)
 
     assert_equal [:NEWLINE, "\n", 9, 0], parser.peek_token
   end

test/test_rdoc_parser_c.rb

@@ -327,7 +327,7 @@ def test_do_classes_boot_class_nil
 
     klass = util_get_class content, 'cFoo'
     assert_equal "this is the Foo boot class", klass.comment.text
-    assert_equal nil, klass.superclass
+    assert_nil klass.superclass
   end
 
   def test_do_aliases_missing_class
@@ -1377,7 +1377,7 @@ def test_find_modifiers_nodoc
 
     parser.find_modifiers comment, method_obj
 
-    assert_equal nil, method_obj.document_self
+    assert_nil method_obj.document_self
   end
 
   def test_find_modifiers_yields