Tweaks - add module to setup, revise doc.

Author: rocky

mathics/builtin/fileformats/__init__.py

@@ -1,11 +1,13 @@
 """
-Fileformats
-
-Importers / Exporters use some internal routines/ Symbols to accomplish their task. Submodules
-in this folder contain these routines. The context of the corresponding symbols are subcontexts of
-System`, like System`HTML` or System`XML to avoid spoil the System` namespace.
+File Formats
 
+Built-in Importers.
 
 """
 
+# The Built-in Functions are defined in a separate context under the
+# System`. For example System`HTML` and System`XML.  This is done to not
+# pollute the System` namespace.
+
+
 from mathics.version import __version__  # noqa used in loading to check consistency.

setup.py

@@ -126,6 +126,7 @@ def subdirs(root, file="*.*", depth=10):
         "mathics.builtin",
         "mathics.builtin.compile",
         "mathics.builtin.drawing",
+        "mathics.builtin.fileformats",
         "mathics.builtin.files_io",
         "mathics.builtin.numbers",
         "mathics.builtin.numpy_utils",

test/test_assumptions.py

@@ -2,8 +2,6 @@
 from .helper import check_evaluation
 import pytest
 
-from mathics_scanner.errors import IncompleteSyntaxError
-
 list_test_assumptions_integrate = [
     (
         "Integrate[x^n, {x, 0, 1}]",

test/test_returncode.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import subprocess
 
 import os.path as osp
@@ -7,7 +8,6 @@ def get_testdir():
     return osp.realpath(filename)
 
 def test_returncode():
-    subprocess.run(["dir", r"..\builtins\fileformats"])
     assert subprocess.run(["mathics", "-e", "Quit[5]"]).returncode == 5
     assert subprocess.run(["mathics", "-e", "1 + 2'"]).returncode == 0
     assert subprocess.run(["mathics", "-e", "Quit[0]"]).returncode == 0