Clear ansi color escapes from rspec traces

[andrcuns]

RSpec trace can often contain ansi color escape codes. Clear these to make error messages more readable.

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Allure report

allure-report-publisher generated test report!

rspec: ✅ test report for 069e7674

+--------------------------------------------------------------------------+
|                            behaviors summary                             |
+---------------------+--------+--------+---------+-------+-------+--------+
|                     | passed | failed | skipped | flaky | total | result |
+---------------------+--------+--------+---------+-------+-------+--------+
| allure-cucumber     | 96     | 0      | 0       | 0     | 96    | ✅     |
| allure-rspec        | 63     | 0      | 0       | 0     | 63    | ✅     |
| allure-ruby-commons | 270    | 0      | 0       | 0     | 270   | ✅     |
+---------------------+--------+--------+---------+-------+-------+--------+
| Total               | 429    | 0      | 0       | 0     | 429   | ✅     |
+---------------------+--------+--------+---------+-------+-------+--------+

[codeclimate]

Code Climate has analyzed commit 069e767 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (80% is the threshold).

This pull request will bring the total coverage in the repository to 99.5% (0.0% change).

View more on Code Climate.