src/sage/misc/package.py: Make comment more specific

Author: Matthias Koeppe

src/sage/misc/package.py

@@ -183,7 +183,7 @@ def pip_installed_packages(normalization=None):
         True
         sage: 'beautifulsoup4' in d                             # needs beautifulsoup4
         True
-        sage: 'prompt-toolkit' in d or 'prompt_toolkit' in d    # whether - or _ appears in the name depends on tool versions
+        sage: 'prompt-toolkit' in d or 'prompt_toolkit' in d    # whether - or _ appears in the name depends on the setuptools version used for building the package
         True
         sage: d = pip_installed_packages(normalization='spkg')
         sage: d['prompt_toolkit']