For example, is rendered like onetwo, with the “two” in subscript in the resulting HTML. To prevent that from happening, the Org manual recommends using zero width space to break up the syntax:
In this example, a zero-width-space is added1 before the underscore:
one_two
The result is rendered as one_two. The zero-width space is included in the rendered HTML page, so it will only be hidden when the page uses a character set that includes zero-width spaces, otherwise the result is one​_two.
References
You may sometimes want to write text that looks like Org syntax, but should really read as plain text. […] In the general case, however, we suggest to use the zero width space.
To insert a zero-width-space in Erlang, hit
↩︎C-x8<RET>zero width space<RET>.