Place default values near its definitions

This patch not only improves visibility, but also fixes a potential bug.
When a lint description ends with code block, the string will have three
backquotes at the end.
Since the current implementation prints the default value immediately
after that, the markdown renderer is unable to properly close the code
block.

clippy_lints/src/utils/internal_lints/metadata_collector.rs

@@ -558,8 +558,8 @@ impl fmt::Display for ClippyConfiguration {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> fmt::Result {
         writeln!(
             f,
-            "* `{}`: `{}`: {} (defaults to `{}`)",
-            self.name, self.config_type, self.doc, self.default
+            "* `{}`: `{}`(defaults to `{}`): {}",
+            self.name, self.config_type, self.default, self.doc
         )
     }
 }