regex pattern fails with length limiters or when end of string is present ($)

[ssbarnea]

There is something wrong on how the regex pattern is implemented as they seem to break:

• ^[a-zA-Z-\s] looks like working
• ^[a-zA-Z-\s]{2,40} incorrectly passes tests even with strings longer
• ^[a-zA-Z-\s]{2,40}$ incorrectly fails all strings regardless of their length
• ^[a-zA-Z-\s]$ incorrectly breaks the matching, even if inside the documentation are examples of patterns ending in $.

This prevents practical uses of regex for the two rules that can check the suite and test names.

As a side note, it would be very useful if we could have some placeholders for regex and string inside the message string, so we can generate a nice error message.

now: Keep suite name readable.
potential: Suite name does not match required {{regex}} pattern: {{suite}}