change name of files which pass rspec regression test

[k77ch7]

This PR is related to #2174. This change adds _spec to name of files which pass rspec regression test.

Rake task

jruby bin/rake spec:regression

Results

Before; on master(5041f5c)

288 examples, 0 failures

After; on master(fdc5a0e)

300 examples, 0 failures

[headius]

Oh, good find. Bad naming practices I guess.

I'm interring from your PR that there are some regression specs that don't pass? That we need to address too.

[k77ch7]

@headius The following regression specs don't pass.

• GH-1633_bigdecimal_operations_with_nil.rb
• GH-1726_File_read_raises_an_enoent.rb
• GH-1940_symlink_load_path_should_not_expand_in_FILE.rb
• GH-1960_nonlocal_return_in_define_method_block.rb
• GH-1980_multiple_nonlocal_returns_in_flight.rb
• GH-2132_catch_nonlocal_return_lje.rb
• GH-652_time_add.rb