feat: forbid creating IniDefault using struct expression

This ensures that new fields can be added to it without it being
a breaking change.

src/ini.rs

@@ -35,6 +35,7 @@ pub struct Ini {
 ///let mut config2 = Ini::new_from_defaults(default); // default gets consumed
 ///```
 #[derive(Debug, Clone, Eq, PartialEq)]
+#[non_exhaustive]
 pub struct IniDefault {
  ///Denotes the default section header name.
  ///## Example
@@ -145,16 +146,9 @@ impl Ini {
  ///use configparser::ini::Ini;
  ///use configparser::ini::IniDefault;
  ///
- ///let default = IniDefault {
- /// default_section: "default".to_owned(),
- /// comment_symbols: vec![';'],
- /// delimiters: vec!['='],
- /// boolean_values: [
- /// (true, vec!["true", "yes", "t", "y", "on", "1"].iter().map(|&s| s.to_owned()).collect()),
- /// (false, vec!["false", "no", "f", "n", "off", "0"].iter().map(|&s| s.to_owned()).collect()),
- /// ].iter().cloned().collect(),
- /// case_sensitive: true,
- ///};
+ ///let mut default = IniDefault::default();
+ ///default.comment_symbols = vec![';'];
+ ///default.delimiters = vec!['='];
  ///let mut config = Ini::new_from_defaults(default.clone());
  ///// Now, load as usual with new defaults:
  ///let map = config.load("tests/test.ini").unwrap();
@@ -199,16 +193,9 @@ impl Ini {
  ///use configparser::ini::IniDefault;
  ///
  ///let mut config = Ini::new();
- ///let default = IniDefault {
- /// default_section: "default".to_owned(),
- /// comment_symbols: vec![';', '#'],
- /// delimiters: vec!['=', ':'],
- /// boolean_values: [
- /// (true, vec!["true", "yes", "t", "y", "on", "1"].iter().map(|&s| s.to_owned()).collect()),
- /// (false, vec!["false", "no", "f", "n", "off", "0"].iter().map(|&s| s.to_owned()).collect()),
- /// ].iter().cloned().collect(),
- /// case_sensitive: true,
- ///}; // This is equivalent to ini_cs() defaults
+ ///let mut default = IniDefault::default();
+ ///default.case_sensitive = true;
+ ///// This is equivalent to ini_cs() defaults
  ///config.load_defaults(default.clone());
  ///assert_eq!(config.defaults(), default);
  ///```