docs: tag non-rust code blocks as such instead of ignoring them

src/app/mod.rs

@@ -966,7 +966,7 @@ impl<'a, 'b> App<'a, 'b> {
     ///
     /// The above example displays the following help message
     ///
-    /// ```ignore
+    /// ```text
     /// cust-ord
     ///
     /// USAGE:
@@ -1087,7 +1087,7 @@ impl<'a, 'b> App<'a, 'b> {
     ///
     /// Next, we set up our `Cargo.toml` to use a `build.rs` build script.
     ///
-    /// ```ignore
+    /// ```toml
     /// # Cargo.toml
     /// build = "build.rs"
     ///

src/args/arg_matches.rs

@@ -428,7 +428,7 @@ impl<'a> ArgMatches<'a> {
     /// Given the above fictional subcommand hierarchy, valid runtime uses would be (not an all
     /// inclusive list, and not including argument options per command for brevity and clarity):
     ///
-    /// ```ignore
+    /// ```sh
     /// $ git clone url
     /// $ git push origin path
     /// $ git add ref local

src/lib.rs

@@ -236,7 +236,7 @@
 //!
 //! If you were to compile any of the above programs and run them with the flag `--help` or `-h` (or `help` subcommand, since we defined `test` as a subcommand) the following would be output
 //!
-//! ```ignore
+//! ```text
 //! $ myprog --help
 //! My Super Program 1.0
 //! Kevin K. <[email protected]>
@@ -368,7 +368,7 @@
 //!
 //! If contributing, you can run the tests as follows (assuming you're in the `clap-rs` directory)
 //!
-//! ```ignore
+//! ```sh
 //! $ cargo test && make -C clap-tests test
 //! $ cargo test --features yaml
 //!