gh-149402: don't assume single-character type codes (struct/array/ctypes)#149483

skirpichev wants to merge 4 commits intopython:mainpython/cpython:mainfrom

skirpichev:improve-pep3118-docs-p1/149402skirpichev/cpython:improve-pep3118-docs-p1/149402Copy head branch name to clipboard