DOC: Wrong documentation rendering when a space is missing after backticks

[datapythonista]

It seems like the documentation is not rendering correctly when a space is not present after using backticks.

For example making ``DataFrame`` render with monospace font will work as expected.

But using plural ``DataFrame``s does not have a space between `` and s does not identify the closing backticks and the whole paragraph may render with monospace.

This image shows a real case in https://pandas.pydata.org/pandas-docs/stable/merging.html#ignoring-indexes-on-the-concatenation-axis:

Couldn't find a way to obtain the expected result (monospace text followed by normal text with a space in between). Not sure if there is a way, but if it's not possible, I think it would be better to use something like the next options (instead of the wrong rendering):

• Avoid having the s for plurals
• Leave a space before the s
• Use a single quote (e.g. ``DataFrame``'s) which seems to be rendering correctly as DataFrame's.

[jorisvandenbossche]

More options:

• use "DataFrame objects" if you really want the plural and code-formatted "DataFrame"
• don't quote it at all, see DOC: to quote or not to quote #19750