fix typo in suggested change

xrft/xrft.py

@@ -386,11 +386,11 @@ def fft(
     # raise error if there are multiple coordinates attached to the dimension(s) over which the FFT is taken
     for d in dim:
         bad_coords = [
-            cname for cname in da.coords if cname != dim and dim in da[cname].dims
+            cname for cname in da.coords if cname != d and d in da[cname].dims
         ]
         if bad_coords:
             raise ValueError(
-                f"The input array contains coordinate variable(s) ({bad_coords}) whose dims include the transform dimension(s) `{dim}`. "
+                f"The input array contains coordinate variable(s) ({bad_coords}) whose dims include the transform dimension(s) `{d}`. "
                 f"Please drop these coordinates (`.drop({bad_coords}`) before invoking xrft."
             )