Explicitly mention requirements.txt, to perform better in web searches
This is basically based on a wild guess, that the search engines would
rank this higher in searches about requirements.txt files, if we mention
the file explicitly here.
# Requirements File Format
Requirements files serve as a list of items to be installed by pip, when
-using {ref}`pip install`.
+using {ref}`pip install`. Files that use this format are often called
+"pip requirements.txt files", since `requirements.txt` is usually what
+these files are named (although, that is not a requirement).
```{note}
This is NOT a format that other tools should try to consume.
