[data.indian.datamodule] Improve documentation

src/ptbench/data/indian/datamodule.py

@@ -21,9 +21,10 @@ def make_split(basename: str) -> DatabaseSplit:
 class DataModule(CachingDataModule):
     """Indian collection dataset for computer-aided diagnosis.
 
-    The Indian collection database has been established to foster research
-    in computer-aided diagnosis of pulmonary diseases with a special
-    focus on pulmonary tuberculosis (TB).
+    The Indian collection database has been established to foster research in
+    computer-aided diagnosis of pulmonary diseases with a special focus on
+    pulmonary tuberculosis (TB).  This database is also known as the "Database
+    A/Database B" database.
 
     * Original images PNG, 8-bit grayscale, 1024 x 1024 pixels
     * Split reference: [INDIAN-2013]_ with 20% of train set for the validation set