Add digraph {chars} to the list. {chars} must be a string with two characters. {digraph} is a string with one UTF-8 encoded character. Be careful, composing characters are NOT ignored. This function is similar to :digraphs command, but useful to add digraphs start with a white space.

The function result is v:true if digraph is registered. If this fails an error message is given and v:false is returned.

If you want to define multiple digraphs at once, you can use digraph_setlist().

Example:

call digraph_set('  ', 'あ')

Can be used as a method:

GetString()->digraph_set('あ')

This function works only when compiled with the +digraphs feature. If this feature is disabled, this function will display an error message.