Treat "end" as reserved word with consideration of indent

"end" after "." or "::" is treated as local variable or method,
see `EXPR_DOT_bit` for detail.
However this "changes" where `bar` method is defined. In the example
below it is not module Z but class Foo.

```
module Z
  class Foo
    foo.
  end

  def bar
  end
end
```

[Feature #19013]

1 files changed, 51 insertions, 0 deletions

diff --git a/test/ruby/test_ast.rb b/test/ruby/test_ast.rb
index 2f05bf97a1..033a09b4c0 100644
--- a/test/ruby/test_ast.rb
+++ b/test/ruby/test_ast.rb
@@ -956,4 +956,55 @@ dummy
              body: (VCALL@2:2-2:3 :a))))
     EXP
   end
+
+  def test_error_tolerant_treat_end_as_keyword_based_on_indent
+    node = RubyVM::AbstractSyntaxTree.parse(<<~STR, error_tolerant: true)
+      module Z
+        class Foo
+          foo.
+        end
+
+        def bar
+        end
+      end
+    STR
+
+    str = ""
+    PP.pp(node, str)
+    assert_equal(<<~EXP, str)
+      (SCOPE@1:0-8:3
+       tbl: []
+       args: nil
+       body:
+         (MODULE@1:0-8:3 (COLON2@1:7-1:8 nil :Z)
+            (SCOPE@1:0-8:3
+             tbl: []
+             args: nil
+             body:
+               (BLOCK@1:8-8:3 (BEGIN@1:8-1:8 nil)
+                  (CLASS@2:2-8:3 (COLON2@2:8-2:11 nil :Foo) nil
+                     (SCOPE@2:2-8:3
+                      tbl: []
+                      args: nil
+                      body:
+                        (DEFN@6:2-7:5
+                         mid: :bar
+                         body:
+                           (SCOPE@6:2-7:5
+                            tbl: []
+                            args:
+                              (ARGS@6:9-6:9
+                               pre_num: 0
+                               pre_init: nil
+                               opt: nil
+                               first_post: nil
+                               post_num: 0
+                               post_init: nil
+                               rest: nil
+                               kw: nil
+                               kwrest: nil
+                               block: nil)
+                            body: nil))))))))
+    EXP
+  end
 end