Take lacona output and generate a simple string.
Useful for passing to lacona-addon-* functions.
Given this input:
{
"match": [
{"string": "a"},
{"string": " "}
],
"suggestion": {
"charactersComplete": 0,
"words": [
{"string": "b"}
]
},
"completion": [
{"string": " "},
{"string": "c"}
]
}
Generate this output:
"a b c"