ci: add coverage and ruff (#1383)

* add coverage calculation and push

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* new codecov version and usage of token

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* enable ruff formatter instead of black and isort

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff lint fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff unsafe fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* add removed imports

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* runs 1 on linter issues

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* finalize linter fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Update pyproject.toml

Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>
Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>

tests/test_backend_asciidoc.py

@@ -19,7 +19,6 @@ def _get_backend(fname):
 
 
 def test_asciidocs_examples():
-
     fnames = sorted(glob.glob("./tests/data/asciidoc/*.asciidoc"))
 
     for fname in fnames:
@@ -38,8 +37,8 @@ def test_asciidocs_examples():
         print("\n\n", pred_mddoc)
 
         if os.path.exists(gname):
-            with open(gname, "r") as fr:
-                true_mddoc = fr.read()
+            with open(gname) as fr:
+                fr.read()
 
             # assert pred_mddoc == true_mddoc, "pred_mddoc!=true_mddoc for asciidoc"
         else: