Add ruff rules for sring concatenation (#547)

Author: cbornet

examples/notebooks/qa-maximal-marginal-relevance.ipynb

@@ -215,7 +215,7 @@
    "outputs": [],
    "source": [
     "BASE_SENTENCE_0 = (\n",
-    "    \"The frogs and the toads were meeting in the night \" \"for a party under the moon.\"\n",
+    "    \"The frogs and the toads were meeting in the night for a party under the moon.\"\n",
     ")\n",
     "\n",
     "BASE_SENTENCE_1 = (\n",
@@ -234,7 +234,7 @@
     ")\n",
     "\n",
     "DIFFERENT_SENTENCE = (\n",
-    "    \"For the party, frogs and toads set a rule: \" \"everyone was to wear a purple hat.\"\n",
+    "    \"For the party, frogs and toads set a rule: everyone was to wear a purple hat.\"\n",
     ")"
    ]
   },

pyproject.toml

@@ -62,6 +62,7 @@ select = [
     "E",
     "F",
     "I",
+    "ISC",
     "N",
     "UP",
     "W",