sort.py: print more standard error messages

Where applicable, instead of creating custom ones.

Example error messages:

    rm -f 123 && ./contrib/sort.py 123
    [ Error ] [Errno 2] No such file or directory: '123'
    touch 123 && chmod -rwx 123 && ./contrib/sort.py 123
    [ Error ] [Errno 13] Permission denied: '123'

contrib/sort.py

@@ -100,15 +100,15 @@ def main(args):
                 exit_code = fix_profile(filename)
             else:
                 fix_profile(filename)
-        except FileNotFoundError:
-            print(f"[ Error ] Can't find `{filename}'", file=stderr)
+        except FileNotFoundError as err:
+            print(f"[ Error ] {err}", file=stderr)
             exit_code = 1
-        except PermissionError:
-            print(f"[ Error ] Can't read/write `{filename}'", file=stderr)
+        except PermissionError as err:
+            print(f"[ Error ] {err}", file=stderr)
             exit_code = 1
         except Exception as err:
             print(
-                f"[ Error ] An error occurred while processing `{filename}': {err}",
+                f"[ Error ] An error occurred while processing '{filename}': {err}",
                 file=stderr,
             )
             exit_code = 1