:sig
String encode_query(StringMap map)

:params
q : StringMap containing URL parameters to be encoded
return value : a string with the encoded parameters

:see
>uri

:content
Encodes a `StringMap` of URL parameters into a single query-string `String`.


:example
StringMap q;
q["name"] = "Ada Lovelace";
print(encode_query(q), "\n");