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O0005 - ` Quote ended unexpectedly

Error​

    %% @doc To execute the program, call `main`
%%  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: `-quote ended unexpectedly
    main() ->
      ok.

Explanation​

In EDoc, the ` character (known as back-quote) can be used for verbatim quoting.

A character sequence such as `...' is expanded to <code>...</code>, where all occurrences of the special XML characters < and & (and for completeness, also >) in the quoted text have been escaped to &lt;, &amp;, and &gt;, respectively. All whitespace is stripped from the beginning and end of the quoted text.

Notice how thes syntax differs from the more traditional Markdown-style one (`...`).

The most likely cause for the above error is that you are using Markdown-style back-quoting. To fix it, just replace the last ` into ':

    %% @doc To execute the program, call `main'
    main() ->
      ok.

You can read more about verbatim quoting in EDoc here.