FROM_FILE_P       470 src/lread.c      if (FROM_FILE_P (readcharfun))
FROM_FILE_P       494 src/lread.c      if (FROM_FILE_P (readcharfun))
FROM_FILE_P       556 src/lread.c      else if (FROM_FILE_P (readcharfun))
FROM_FILE_P      3686 src/lread.c      if (load_force_doc_strings && FROM_FILE_P (readcharfun))