add function

README.md

@@ -30,7 +30,7 @@ part mentions *selected* functionalities of *selected* useful packages that I fi
 
 By default Jupyter Notebook will limit the number of rows and columns when displaying a data frame to roughly fit the screen size (like in the REPL).
 
-You can override this behavior by setting `ENV["COLUMNS"]` or `ENV["LINES"]` variables to hold the maximum width and height of output in characters respectively before using the `notebook`. Alternatively you can add the following entry `"COLUMNS": "1000", "LINES": "100"` to `"env"` variable in your Jupyter kernel file. See [here](https://jupyter-client.readthedocs.io/en/stable/kernels.html) for information about location and specification of Jupyter kernels.
+You can override this behavior by setting `ENV["COLUMNS"]` or `ENV["LINES"]` variables to hold the maximum width and height of output in characters respectively before using the `notebook` function. Alternatively you can add the following entry `"COLUMNS": "1000", "LINES": "100"` to `"env"` variable in your Jupyter kernel file. See [here](https://jupyter-client.readthedocs.io/en/stable/kernels.html) for information about location and specification of Jupyter kernels.
 
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