reduce line lengths and apply ruff-reformat changes

Author: tserrao

pandas/_libs/window/aggregations.pyx

@@ -1814,7 +1814,7 @@ def ewm(const float64_t[:] vals, const int64_t[:] start, const int64_t[:] end,
                                 # avoid numerical errors on constant series
                                 if weighted != cur:
                                     if not adjust and com == 1:
-                                        # update alpha "on the fly" for irregular-interval time series
+                                        # update in case of irregular-interval series
                                         new_wt = 1. - old_wt
                                     weighted = old_wt * weighted + new_wt * cur
                                     weighted /= (old_wt + new_wt)

pandas/tests/window/test_ewm.py

@@ -156,8 +156,10 @@ def test_ewma_times_adjust_false_with_disallowed_com():
     # GH 54328
     with pytest.raises(
         NotImplementedError,
-        match=("None of com, span, or alpha can be specified "
-               "if times is provided and adjust=False"),
+        match=(
+            "None of com, span, or alpha can be specified "
+            "if times is provided and adjust=False"
+        ),
     ):
         Series(range(1)).ewm(
             0.1,
@@ -171,8 +173,10 @@ def test_ewma_times_adjust_false_with_disallowed_alpha():
     # GH 54328
     with pytest.raises(
         NotImplementedError,
-        match=("None of com, span, or alpha can be specified "
-               "if times is provided and adjust=False"),
+        match=(
+            "None of com, span, or alpha can be specified "
+            "if times is provided and adjust=False"
+        ),
     ):
         Series(range(1)).ewm(
             0.1,
@@ -187,8 +191,10 @@ def test_ewma_times_adjust_false_with_disallowed_span():
     # GH 54328
     with pytest.raises(
         NotImplementedError,
-        match=("None of com, span, or alpha can be specified "
-               "if times is provided and adjust=False"),
+        match=(
+            "None of com, span, or alpha can be specified "
+            "if times is provided and adjust=False"
+        ),
     ):
         Series(range(1)).ewm(
             0.1,