all: Fix various Python coding inconsistencies found by ruff.

This fixes:
- type-comparison (E721): do not compare types, use isinstance().
- string-dot-format-missing-arguments (F524): .format call is missing
  argument(s) for placeholder(s): {message}.
- f-string-missing-placeholders (F541).
- is-literal (F632): Use != to compare constant literals.

The last one is fixed by just comparing for truthfulness of `state`.

shared/memzip/make-memzip.py

@@ -36,7 +36,7 @@ def create_c_from_file(c_filename, zip_filename):
                     break
                 print('   ', end='', file=c_file)
                 for byte in buf:
-                    if type(byte) is types.StringType:
+                    if isinstance(byte, types.StringType):
                         print(' 0x{:02x},'.format(ord(byte)), end='', file=c_file)
                     else:
                         print(' 0x{:02x},'.format(byte), end='', file=c_file)