Cleanup: minor change to string formatting & __file__

Use __repr__ for formatting file instead of __str__ because non-standard
characters will be escaped and the string will be properly quoted.

Also, a modules __file__ is not *guaranteed* to be a string
(although it almost always is), nevertheless, __repr__ generally
results more more humanly readable results.

Note that __repr__ was already used to format __file__ in most places.

scripts/modules/bpy/utils/__init__.py

@@ -235,7 +235,7 @@ def load_scripts(*, reload_scripts=False, refresh_scripts=False, extensions=True
                 import traceback
                 traceback.print_exc()
         else:
-            print("\nWarning! '%s' has no register function, "
+            print("\nWarning! %r has no register function, "
                   "this is now a requirement for registerable scripts" %
                   mod.__file__)
 

scripts/modules/sys_info.py

@@ -223,7 +223,12 @@ def write_sysinfo(filepath):
                 if addon_mod is None:
                     output.write("%s (MISSING)\n" % (addon))
                 else:
-                    output.write("%s (version: %s, path: %s)\n" %
-                                 (addon, addon_mod.bl_info.get('version', "UNKNOWN"), addon_mod.__file__))
+                    output.write(
+                        "%s (version: %s, path: %r)\n" % (
+                            addon,
+                            addon_mod.bl_info.get("version", "UNKNOWN"),
+                            addon_mod.__file__,
+                        )
+                    )
         except BaseException as ex:
             output.write("ERROR: %s\n" % ex)