fix(ivy/functional): update diagflat docstring

ivy/functional/ivy/experimental/linear_algebra.py

@@ -165,6 +165,7 @@ def eigh_tridiagonal(
 @handle_exceptions
 @handle_backend_invalid
 @handle_nestable
+@handle_backend_invalid
 @handle_array_like_without_promotion
 @handle_out_argument
 @to_native_arrays_and_back
@@ -185,7 +186,8 @@ def diagflat(
 
     Parameters
     ----------
-    x
+
+       x
         Input data, which is flattened and set as the k-th diagonal of the output.
     k
         Diagonal to set.
@@ -198,11 +200,12 @@ def diagflat(
 
     Returns
     -------
-    ret
+    ret : ivy.Array
         The 2-D output array.
 
-    Examples
-    --------
+    Functional Examples
+    ------------------
+
     With :class:`ivy.Array` inputs:
 
     >>> x = ivy.array([[1,2], [3,4]])
@@ -213,7 +216,7 @@ def diagflat(
                [0, 0, 0, 4]])
 
     >>> x = ivy.array([1,2])
-    >>> ivy.diagflat(x, k=1)
+    >>> ivy.diagflat(x, offset=1)
     ivy.array([[0, 1, 0],
                [0, 0, 2],
                [0, 0, 0]])