To minimize the amount of unnecessary typing, pandoc filters automatically
converts character strings to pandoc objects of type "Str" if needed.
Furthermore, if a single inline object is provided where a list of inline
objects is needed pandocfilters automatically converts this inline
object into a list of inline objects. For example, the canonical way to emphasize
the character string "some text" would be Emph(list(Str("some text")))
since single inline objects are automatically transformed to lists of inline objects,
this is equivalent to Emph(Str("some text")). Since a character
string is automatically transformed to an inline object, this is is equivalent
to Emph("some string"). In short, whenever a list of inline objects
is needed one can also use a single inline object or a character string.