Update src/tensors/braidingtensor.jl

Co-authored-by: Lukas Devos <ldevos98@gmail.com>

Author: kshyatt

src/tensors/braidingtensor.jl

@@ -112,10 +112,8 @@ function _braiding_factor(f₁, f₂, inv::Bool = false)
 end
 
 function _set_subblock!(data, val)
-    @inbounds for i in axes(data, 1), j in axes(data, 2)
-        data[i, j, j, i] = val
-    end
-    return data
+    f(I) = ((I[1] == I[4]) & (I[2] == I[3])) * val
+    data .= f.(CartesianIndices(data))
 end