Correct selection hash

[theKashey]

33 exposed an edge case for regular expression matching the wrong part of a string

• obvious fix (https://github.com/theKashey/used-styles/commit/68449e3b15b4041a1fc9d521e1900eef2f3d21db) broke many other cases
• use case-specific fix (https://github.com/theKashey/used-styles/commit/a8899eeb8ee7856ecbcf5528a7d207f71120baf0) seems to be fine

[theKashey]

v2.3.1 has been released with the patch