The double single quote is how you escape a single quote inside a single quoted string in YAML. It makes sense because the single quote itself is the only character which needs to be escaped inside a single quoted string, and it's unambiguous because two quoted strings after each other without anything between is a syntax error in YAML.

Den tors 16 maj 2019 10:55jiewuza <jiewuza-9Onoh4P/yGk@public.gmane.org> skrev:

Thanks.

The `double single-quote` stuff is consistent to https://github.com/dotmaster/toYaml/issues/1

But it is a little complicated.

BPJ <melroch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> I usually use a code span or code block in the metadata when I want it to stringify verbatim with ASCII quotes, dollars, square brackets etc.
> preserved. The stringification function should turn this into a plain string without any change to the Lua code. Note however that since the backtick is a
> reserved character in YAML you must enclose the code span in a single quoted string and double any single quotes inside the string:
>
> ````pandoc-markdown
> ---
> test: '`Children''s cognitive ability`'
> block: |
>   ```
>   Children's cognitive ability.
>   Several.
>   Lines.
>   Of.
>   Text.
>   ```
> ---
> ````
>
> thus in your particular example the backslash escape may be preferable, but I definitely prefer the code span/block solution when there are many
> sensitive characters in the string. A lot of backslash escapes affect readability negatively, especially when you need to escape backslashes
> themselves. For some reason I find `` '`don''t`' `` more readable than `` don\'t ``, but YMMV.
>
> Den tors 16 maj 2019 09:41jiewuza <jiewuza-9Onoh4P/yGk@public.gmane.org> skrev:
>
>  I checked the manual, `smart` has effect on quotes and dashes.
>  Instead of disabling smart, I have to escape it to minimize the effect.
>
>  BTW, if it is for the title value
>  ```
>  ---
>  title: Children's Cognitive Ability
>  ---
>  ```
>
>  I get the expected result withouth escaping the quote or disabling smart:
>
>  ```
>  \title{Children's Cognitive Ability}
>  ```
>
>  Pandoc deals with it differently from a lua filter?
>
>  John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>  > YAML metadata fields are interpreted as markdown.
>  >
>  > You can escape it to prevent "smartification":
>  >
>  >     Children\'s Cognitive Ability
>  >
>  > Or disable smartification globally by using `-f
>  > markdown-smart` on the command line.
>  >
>  > jiewuza <jiewuza-9Onoh4P/yGk@public.gmane.org> writes:
>  >
>  >> I have some meta value like
>  >> ```
>  >> ---
>  >> test: Children's Cognitive Ability
>  >> ---
>  >> ```
>  >>
>  >> In my lua filter:
>  >> ```
>  >> function Meta(meta)
>  >>   for k, v in pairs(meta) do
>  >>     if k=='test' then
>  >>       print(pandoc.utils.stringify(v))
>  >>     end
>  >>   end
>  >> end
>  >> ```
>  >>
>  >> I find it prints
>  >> ```
>  >> Children’s Cognitive Ability
>  >> ```
>  >>
>  >> I want to keep the single quote as it is. What should I do?
>  >>
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