Reduce confidence in error string leading capital check.
Reduce confidence in error string leading capital check.

People often use proper nouns or exported Go identifiers in error strings,
which reduces the SNR for this check.

golang/lint,elgris/hint,gorcz/lint,zimmski/lint,darkliquid/lintci,lutzky/lint,JekaMas/hint,tmc/lint,NichoZhang/lint,hellosuper/gohint,kovetskiy/lint