* Fix typo and style in README template
* Fix `shold` to `should`
* Fix minor style issues in `### Common pytest options`
* Add blank line after all headers
* Regenerate all READMEs
* Remove redundant periods in READMEs
* add "Running the tests" section to README template
* regenerate README files with new template
* rewrite Running the tests section for clarity
* -switch to a plaintext-readable format
-add link explaining py.test vs pytest
* Implement checks for messages being raised with exceptions
(Fixes#1080)
* Add self.assertRaisesWithMessage method to relevant exercise tests
- Uses self.assertRaisesRegex
- Checks only for the presence of a message, not content
* Add meaningful messages to failing examples
* octal: Switch to using a context manager for exception tests
* Add note regarding error messages to the insert
* simple-linked-list: Move hints.md to correct location
* simple-cipher: Remove extra whitespace from lines
* collatz-conjecture: Update hints.md
* Regenerate README to include exceptions section
