corrected problematic pip commands generated by _download_additional_modules (#715)

Co-authored-by: Quentin Lhoest <42851186+lhoestq@users.noreply.github.com>

Author: Yacklin

src/evaluate/loading.py

@@ -260,14 +260,15 @@ def _download_additional_modules(
             lib = importlib.import_module(library_import_name)  # noqa F841
         except ImportError:
             library_import_name = "scikit-learn" if library_import_name == "sklearn" else library_import_name
+            library_import_path = "scikit-learn" if library_import_path == "sklearn" else library_import_path
             library_import_name = "absl-py" if library_import_name == "absl" else library_import_name
             library_import_path = "absl-py" if library_import_path == "absl" else library_import_path
             needs_to_be_installed.add((library_import_name, library_import_path))
     if needs_to_be_installed:
         raise ImportError(
             f"To be able to use {name}, you need to install the following dependencies"
             f"{[lib_name for lib_name, lib_path in needs_to_be_installed]} using 'pip install "
-            f"{' '.join([lib_path for lib_name, lib_path in needs_to_be_installed])}' for instance'"
+            f"{' '.join([lib_path for lib_name, lib_path in needs_to_be_installed])}' for instance."
         )
     return local_imports