ScanCode incorrectly identifies BSD-3-Clause text as proprietary license

[richardfontana]

Description

I ran ScanCode 31.0.0rc1 on the Fedora source package for webkit2gtk3-2.36.5. The license text in one file, which appears to be identical or substantially identical to this Webkit source file:
https://github.com/WebKit/WebKit/blob/main/Source/cmake/DetectSSE2.cmake
was incorrectly identified as "proprietary-license" by ScanCode, with the score 90.99, for reasons that are unclear to me.
The "matched-rule" is "proprietary-license_501.RULE".

System configuration

• What OS are you running on? (Windows/MacOS/Linux) Linux
• What version of scancode-toolkit was used to generate the scan file? 31.0.0rc1
• What installation method was used to install/run scancode? (pip/source download/other)
  I used the Linux release archive for the stated version of scancode-toolkit.

[pombredanne]

@richardfontana Thank you ++ for the report!

[pombredanne]

See #3041 for a likely fix

[pombredanne]

@richardfontana this fix works and has been merged and will be in the next release.
Thanks!