chore: make warning message more consistent

Author: Mrglglglglgl

pyretailscience/plots/line.py

@@ -77,7 +77,7 @@ def plot(
     """
     if x_col is not None and pd.api.types.is_datetime64_any_dtype(df[x_col]):
         warnings.warn(
-            f"The column '{x_col}' is datetime-like. Consider using the 'timeline' module for time-based plots.",
+            f"The column '{x_col}' is datetime-like. Consider using the 'plots.timeline' module for time-based plots.",
             UserWarning,
             stacklevel=2,
         )

tests/plots/test_line.py

@@ -96,7 +96,7 @@ def test_plot_warns_if_xcol_is_datetime(sample_dataframe, mocker):
     )
 
     warnings.warn.assert_called_once_with(
-        "The column 'x' is datetime-like. Consider using the 'timeline' module for time-based plots.",
+        "The column 'x' is datetime-like. Consider using the 'plots.timeline' module for time-based plots.",
         UserWarning,
         stacklevel=2,
     )