src/img2pdf.py: reformat with black

src/img2pdf.py

@@ -1489,10 +1489,8 @@ def get_imgmetadata(
         with io.BytesIO(iccp) as f:
             prf = ImageCms.ImageCmsProfile(f)
 
-        if prf.profile.xcolor_space not in ('GRAY'):
-            logger.warning(
-                "Ignoring non-GRAY ICC profile in Grayscale JPG"
-            )
+        if prf.profile.xcolor_space not in ("GRAY"):
+            logger.warning("Ignoring non-GRAY ICC profile in Grayscale JPG")
             iccp = None
 
     logger.debug("width x height = %dpx x %dpx", imgwidthpx, imgheightpx)
@@ -4094,6 +4092,9 @@ RGB.""",
         % Image.MAX_IMAGE_PIXELS,
     )
 
+    if sys.platform == "win32":
+        pass
+    else:
         outargs.add_argument(
             "--pdfa",
             nargs="?",