Internal updates to MSCommon/MSVC/Util.py and MSCommon/MSVC/Config.py.

Changes:
* Adjust os path separators in MSCommon/MSVC/Util.py
* Revise commend inside resolve_path method in in MSCommon/MSVC/Util.py
* Move Util import inside verify method in MSCommon/MSVC/Config.py (prevent import dependency loops).

SCons/Tool/MSCommon/MSVC/Config.py

@@ -29,8 +29,6 @@
     namedtuple,
 )
 
-from . import Util
-
 from .Exceptions import (
     MSVCInternalError,
 )
@@ -319,6 +317,7 @@
 
 
 def verify():
+    from . import Util
     from .. import vc
     for msvc_version in vc._VCVER:
         if msvc_version not in MSVC_VERSION_SUFFIX:

SCons/Tool/MSCommon/MSVC/Util.py

@@ -43,7 +43,7 @@
 _RE_DRIVESPEC = re.compile(r'^[A-Za-z][:]$', re.IGNORECASE)
 
 # windows path separators
-_OS_PATH_SEPS = ('\\', '/')
+_OS_PATH_SEPS = (os.path.sep, os.path.altsep) if os.path.altsep else (os.path.sep,)
 
 def listdir_dirs(p):
     """
@@ -87,9 +87,9 @@ def resolve_path(p, ignore_drivespec=True):
             # don't attempt to resolve drive specification (e.g., C:)
             pass
         else:
-            # both abspath and resolve necessary to produce identical path
-            # when (unqualified) file name is on a mapped network drive for
-            # python 3.6 and 3.11
+            # both abspath and resolve necessary for an unqualified file name
+            # on a mapped network drive in order to return a mapped drive letter
+            # path rather than a UNC path.
             p = os.path.abspath(p)
             try:
                 p = str(pathlib.Path(p).resolve())