docs: Replace package abbreviations with full name(bitsandbytes) in docstrings (huggingface#33230)

* docs: Provide fullname for `bitsandbytes` package

* docs: Provide fullname for `bitsandbytes` package (2)

Author: rapsealk

src/transformers/trainer.py

@@ -1274,7 +1274,7 @@ def get_optimizer_cls_and_kwargs(
                 optimizer_kwargs.update(additional_optim_kwargs)
                 optimizer_kwargs.update(bnb_kwargs)
             except ImportError:
-                raise ValueError("Trainer tried to instantiate bnb optimizer but bnb is not installed!")
+                raise ValueError("Trainer tried to instantiate bnb optimizer but `bitsandbytes` is not installed!")
             if is_bitsandbytes_available() and version.parse(
                 importlib.metadata.version("bitsandbytes")
             ) < version.parse("0.41.1"):

tests/trainer/test_trainer.py

@@ -4427,7 +4427,7 @@ def test_bnb_adam8bit_no_bnb(self):
         args = TrainingArguments(optim=OptimizerNames.ADAMW_BNB, output_dir="None")
 
         # Pretend that bnb does not exist, even if installed. By setting bnb to None, importing
-        # bnb will fail even if bnb is installed.
+        # bnb will fail even if `bitsandbytes` is installed.
         with patch.dict("sys.modules", {"bitsandbytes.optim": None}):
             with self.assertRaises(ValueError):
                 Trainer.get_optimizer_cls_and_kwargs(args)
@@ -4436,7 +4436,7 @@ def test_bnb_paged_adam_no_bnb(self):
         args = TrainingArguments(optim=OptimizerNames.PAGED_ADAMW, output_dir="None")
 
         # Pretend that bnb does not exist, even if installed. By setting bnb to None, importing
-        # bnb will fail even if bnb is installed.
+        # bnb will fail even if `bitsandbytes` is installed.
         with patch.dict("sys.modules", {"bitsandbytes.optim": None}):
             with self.assertRaises(ValueError):
                 Trainer.get_optimizer_cls_and_kwargs(args)
@@ -4445,7 +4445,7 @@ def test_bnb_paged_adam8bit_no_bnb(self):
         args = TrainingArguments(optim=OptimizerNames.PAGED_ADAMW_8BIT, output_dir="None")
 
         # Pretend that bnb does not exist, even if installed. By setting bnb to None, importing
-        # bnb will fail even if bnb is installed.
+        # bnb will fail even if `bitsandbytes` is installed.
         with patch.dict("sys.modules", {"bitsandbytes.optim": None}):
             with self.assertRaises(ValueError):
                 Trainer.get_optimizer_cls_and_kwargs(args)
@@ -4454,7 +4454,7 @@ def test_bnb_paged_lion_no_bnb(self):
         args = TrainingArguments(optim=OptimizerNames.PAGED_LION, output_dir="None")
 
         # Pretend that bnb does not exist, even if installed. By setting bnb to None, importing
-        # bnb will fail even if bnb is installed.
+        # bnb will fail even if `bitsandbytes` is installed.
         with patch.dict("sys.modules", {"bitsandbytes.optim": None}):
             with self.assertRaises(ValueError):
                 Trainer.get_optimizer_cls_and_kwargs(args)
@@ -4463,7 +4463,7 @@ def test_bnb_paged_lion8bit_no_bnb(self):
         args = TrainingArguments(optim=OptimizerNames.PAGED_LION_8BIT, output_dir="None")
 
         # Pretend that bnb does not exist, even if installed. By setting bnb to None, importing
-        # bnb will fail even if bnb is installed.
+        # bnb will fail even if `bitsandbytes` is installed.
         with patch.dict("sys.modules", {"bitsandbytes.optim": None}):
             with self.assertRaises(ValueError):
                 Trainer.get_optimizer_cls_and_kwargs(args)