Update clippy_lints/src/format_args.rs

Co-authored-by: Alex Macleod <alex@macleod.io>

Author: nyurik

clippy_lints/src/format_args.rs

@@ -102,13 +102,10 @@ declare_clippy_lint! {
     ///
     /// ### Known Problems
     ///
-    /// * There may be a false positive if the format string is wrapped in a macro call:
-    /// ```rust
-    /// # let var = 42;
-    /// macro_rules! no_param_str { () => { "{}" }; }
-    /// macro_rules! pass_through { ($expr:expr) => { $expr }; }
-    /// println!(no_param_str!(), var);
-    /// println!(pass_through!("{}"), var);
+    /// There may be a false positive if the format string is expanded from certain proc macros:
+    ///
+    /// ```ignore
+    /// println!(indoc!("{}"), var);
     /// ```
     ///
     /// * Format string uses an indexed argument that cannot be inlined.