Made changes based on comments on the PR to the doc and tests

Author: devansh2605

doc/oper.xml

@@ -248,6 +248,8 @@ true
     with <C>OnDigraphs(<A>digraph</A>, AsPermutation(<A>trans</A>))</C>.
     <P/>
 
+    Note: <C>OnDigraphs</C> for a digraph and a permutation or transformation can also be used via the <C>\^</C> operator. <P/>
+
     The <Ref Oper="DigraphVertexLabels"/> of <A>digraph</A> will not be retained
     in the returned digraph. <P/>
 
@@ -287,12 +289,10 @@ true
     For a digraph <A>digraph</A> and a permutation <A>perm</A>,
     <C>digraph ^ perm</C> gives the same result as
     <C>OnDigraphs(digraph, perm)</C> — a digraph whose vertices have been relabelled according to the permutation. <P/>
-    Note: <C>OnDigraphs</C> for a digraph and a permutation can also be used via the <C>\^</C> operator. <P/>
 
     Similarly, if the second argument is a transformation <A>trans</A>,
     then <C>digraph ^ trans</C> calls <C>OnDigraphs(digraph, trans)</C>.
     This allows a simple way to apply vertex relabelling or transformations directly using the <C>^</C> symbol. <P/>
-    Note: <C>OnDigraphs</C> for a digraph and a transformation can also be used via the <C>\^</C> operator. <P/>
 
     <Example><![CDATA[
 gap> D := CycleDigraph(5);

tst/standard/oper.tst

@@ -16,7 +16,7 @@
 #@local i1, i2, id, idom, in1, in2, in3, iter, j1, j2, m, m1, m2, mat, n, nbs
 #@local out, out1, out2, out3, p1, p2, path, preorder, qr, r, res, rtclosure, t
 #@local tclosure, u1, u2, x
-#@local D, p, q, t, idp, idt, M
+#@local p, q, idp, idt, M
 gap> START_TEST("Digraphs package: standard/oper.tst");
 gap> LoadPackage("digraphs", false);;