Regression of white-space values: getValuesFromSyntax no longer handles white-space's syntax

[starball5]

Regression of #55.

https://github.com/microsoft/vscode-custom-data/pull/56/files#diff-f0bbe48b1fb24ff03380a7b65cd9212a4e93584c37867b3201809db34b1fb40bR122 no longer works because the syntax for white-space is now normal | pre | nowrap | pre-wrap | pre-line | break-spaces | [ <'white-space-collapse'> || <'text-wrap'> || <'white-space-trim'> ] (|| causes it to not match I think).

See also https://stackoverflow.com/q/78499046/11107541