Restore warning about local_path() and into_local_path() methods

Author: Urgau

compiler/rustc_span/src/lib.rs

@@ -374,6 +374,8 @@ impl RealFileName {
     /// if this information exists.
     ///
     /// May not exists if the filename was imported from another crate.
+    ///
+    /// Avoid embedding this in build artifacts; prefer `path()` or `embeddable_name()`.
     #[inline]
     pub fn local_path(&self) -> Option<&Path> {
         if !self.was_remapped() {
@@ -387,6 +389,8 @@ impl RealFileName {
     /// if this information exists.
     ///
     /// May not exists if the filename was imported from another crate.
+    ///
+    /// Avoid embedding this in build artifacts; prefer `path()` or `embeddable_name()`.
     #[inline]
     pub fn into_local_path(self) -> Option<PathBuf> {
         if !self.was_remapped() {