perf: use static Func to prevent unwanted closures

[TimothyMakkison]

Pass values function arguments instead of capturing them in a closure.

Not sure why Func is used here. I'm assuming that it's delibrately deferring the calculation because PrintingContext might change? IIRC calculating indentifier eagerly didn't cause any tests to fail.

Benchmarks (timing is inaccurate should be the same)

Before

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Default_CodeFormatter_Tests	133.0 ms	2.56 ms	2.84 ms	3000.0000	1000.0000	34.58 MB
Default_CodeFormatter_Complex	271.5 ms	5.40 ms	7.92 ms	5000.0000	2000.0000	52.95 MB

After

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Default_CodeFormatter_Tests	129.9 ms	2.16 ms	3.24 ms	3000.0000	1000.0000	34.55 MB
Default_CodeFormatter_Complex	260.5 ms	5.15 ms	7.55 ms	5000.0000	2000.0000	52.64 MB