Standardise docstring summary line placement.

src/primaite/utils/package_data.py

@@ -10,7 +10,8 @@ _LOGGER = getLogger(__name__)
 
 
 def get_file_path(path: str) -> Path:
-    """Get PrimAITE package data.
+    """
+    Get PrimAITE package data.
 
     :Example:
 

src/primaite/utils/session_output_reader.py

@@ -7,7 +7,8 @@ import polars as pl
 
 
 def av_rewards_dict(av_rewards_csv_file: Union[str, Path]) -> Dict[int, float]:
-    """Read an average rewards per episode csv file and return as a dict.
+    """
+    Read an average rewards per episode csv file and return as a dict.
 
     The dictionary keys are the episode number, and the values are the mean reward that episode.
 

src/primaite/utils/session_output_writer.py

@@ -77,7 +77,8 @@ class SessionOutputWriter:
             _LOGGER.debug(f"Finished writing file: {self._csv_file_path}")
 
     def write(self, data: Union[Tuple, Transaction]):
-        """Write a row of session data.
+        """
+        Write a row of session data.
 
         :param data: The row of data to write. Can be a Tuple or an instance of Transaction.
         """