Reformat code to align with precommit

Signed-off-by: Per Åstrand <per.astrand@arm.com>
Change-Id: Idc6f6959bfc7eabce2f5b6e0d4935d292dcf6618
diff --git a/ethosu/vela/tosa_reader.py b/ethosu/vela/tosa_reader.py
index 5ffefad..670b264 100644
--- a/ethosu/vela/tosa_reader.py
+++ b/ethosu/vela/tosa_reader.py
@@ -247,7 +247,8 @@
                 if depth_multiplier > 1:
                     assert op.ifm.shape[-1] == 1 and op.ofm.shape[-1] == depth_multiplier, (
                         "For depth multipliers > 1, IFM channels must be 1 and "
-                        "OFM channels must be equal to the depth multiplier")
+                        "OFM channels must be equal to the depth multiplier"
+                    )
                 op.attrs["depth_multiplier"] = depth_multiplier
             if op.type == Op.SplitSliceRead:
                 op.read_offsets[0] = Shape4D.from_list(list(op.attrs["start"]), 0)