Clean up documentation sample code and remove 0.2.0 deprecated code

Author: Bas-Man

src/lib.rs

@@ -10,19 +10,19 @@
 //! This crate is able to deconstruct `v=spf1` and `spf2.0` records.
 //!
 //! # Abilities:
-//! - Check and Set Spf record version: [`Spf Versions`](spf::Spf::set_v1)
+//! - Check and Set Spf record version. See: [`Spf Versions`](spf::Spf::set_v1)
 //! - Check and Create Spf Mechanism/Modifiers:
 //!     - [`Mechanism`](mechanism::Mechanism)
-//!     - [`Check Qualifier Type`](mechanism::Mechanism::is_pass)
-//!     - [`Check Mechanism Type`](mechanism::Mechanism::kind)
+//!     - [`Mechanism Qualifier`](mechanism::Mechanism::is_pass)
+//!     - [`Mechanism Kind`](mechanism::Mechanism::kind)
 //!
 //! # Feature Flags:
 //! - `warn-dns` (Disabled by default.)
 //!     - This feature only applies to the Spf Parser and only warns of possible problems.
 //! - `strict-dns` (Disabled by default.)  
 //!   This enables syntactical checking of Domain Names.
 //!     - When enabled it changes the behavour of `FromStr` for `Mechanism<String>` and
-//! `ParsedMechanism`
+//! `ParsedMechanism`. By default `Mechanism<String>`'s `rrdata` is not checked.
 //!
 mod helpers;
 pub mod mechanism;

src/spf/mod.rs

@@ -54,12 +54,12 @@ impl std::fmt::Display for Spf {
 /// use decon_spf::SpfError;
 /// // Successful
 /// let input = "v=spf1 a mx -all";
-/// let spf: Spf = input.to_string().parse().unwrap();
+/// let spf: Spf = input.parse().unwrap();
 /// assert_eq!(spf.to_string(), input);
 ///
 /// // Additional Space between `A` and `MX`
 /// let bad_input = "v=spf1 a   mx -all";
-/// let err: SpfError = bad_input.to_string().parse::<Spf>().unwrap_err();
+/// let err: SpfError = bad_input.parse::<Spf>().unwrap_err();
 /// assert_eq!(err.to_string(), SpfError::WhiteSpaceSyntaxError.to_string());
 /// //  err.to_string() -> "Spf contains two or more consecutive whitespace characters.");
 ///
@@ -526,15 +526,6 @@ impl Spf {
         }
         spf
     }
-    /// Returns a new string representation of the spf record if possible.
-    /// This does not use the `source` attribute.
-    #[deprecated(
-        since = "0.2.0",
-        note = "This has been deprecated. Use to_string() instead."
-    )]
-    pub fn as_spf(&self) -> Result<String, SpfError> {
-        unimplemented!("Spf struct now has a Display trait. Start using to_string()")
-    }
     /// Returns a reference to the string stored in `source`
     pub fn source(&self) -> &String {
         // Source is set to "" by default.