Looks like Doc/tools/susp-ignored.csv needs updating:

$ make -C Doc/ suspicious
[. . .]
writing output... [ 49%] library/hashlib                                        
WARNING: [library/hashlib:502] ":vatrogasac" found in ">>> cookie = b'user:vatrogasac'"
WARNING: [library/hashlib:502] ":vatrogasac" found in "user:vatrogasac,349cf904533767ed2d755279a8df84d0"
WARNING: [library/hashlib:502] ":policajac" found in ">>> compare_digest(b'user:policajac', sig)"
WARNING: [library/hashlib:646] ":LEAF" found in "... h00 = blake2b(buf[0:LEAF_SIZE], fanout=FANOUT, depth=DEPTH,"
[. . .]
WARNING: Found 4/327 unused rules:
library/hashlib-blake2,,:vatrogasac,>>> cookie = b'user:vatrogasac'
library/hashlib-blake2,,:vatrogasac,user:vatrogasac,349cf904533767ed2d755279a8df84d0
library/hashlib-blake2,,:policajac,>>> compare_digest(b'user:policajac', sig)
library/hashlib-blake2,,:LEAF,h00 = blake2b(buf[0:LEAF_SIZE], fanout=FANOUT, depth=DEPTH,
build finished with problems, 7 warnings.
make[1]: *** [build] Error 1
make[1]: Leaving directory `/media/disk/home/proj/python/cpython/Doc'
Suspicious check complete; look for any errors in the above output or in build/suspicious/suspicious.csv.  If all issues are false positives, append that file to tools/susp-ignored.csv.
make: *** [suspicious] Error 1