ci: add codespell action

Author: james-d-mitchell

.github/workflows/codespell.yml

@@ -0,0 +1,8 @@
+name: codespell
+on: [pull_request]
+jobs:
+  codespell:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: codespell-project/[email protected]

tst/standard/labels.tst

@@ -18,8 +18,8 @@ gap> gr := RandomDigraph(10);;
 gap> DigraphVertexLabels(gr);
 [ 1 .. 10 ]
 gap> SetDigraphVertexLabels(gr, ["a", "b", 10]);
-Error, the 2nd arument <names> must be a list with length equal to the number \
-of vertices of the digraph <D> that is the 1st argument,
+Error, the 2nd argument <names> must be a list with length equal to the number\
+ of vertices of the digraph <D> that is the 1st argument,
 gap> gr := RandomDigraph(3);;
 gap> SetDigraphVertexLabels(gr, ["a", "b", 10]);
 gap> DigraphVertexLabels(gr);