Fix tempfile leaks

https://github.com/ruby/reline/actions/runs/11187507536/job/31104699331#step:13:1064 ``` Children under /tmp/rubytest.m48l5o: * -rw------- 1 101 2024-10-02 17:43:51 +0000 rubyfile20241002-60503-bhbfgq ```
ruby · Oct 5, 2024 · f3f07be · f3f07be
1 parent 41b5414
commit f3f07be
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diff --git a/test/reline/test_reline.rb b/test/reline/test_reline.rb
@@ -471,6 +471,8 @@ def test_tty_amibuous_width
       w.close
       Process.waitpid pid
     end
+  ensure
+    File.delete(ruby_file.path) if ruby_file
   end
 
   def get_reline_encoding

diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
@@ -1817,6 +1817,9 @@ def test_stop_continue
       write "\ebg"
       assert_screen(/>abc\n>def\n>ghi\n/)
       close
+    ensure
+      File.delete(rubyfile.path) if rubyfile
+      File.delete(pidfile.path) if pidfile
     end
 
     def write_inputrc(content)