DOC: Missing Source Links

[shriyakalakata]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.columns.html

Documentation problem

There is no link pointing towards the source code

Suggested fix for documentation

Link the source (https://github.com/pandas-dev/pandas/blob/main/pandas/core/apply.py/#L824-L826)

[giormala]

take

[fbourgey]

take