Add comment markers to make merging from upstream easier

Author: ggiraldez

stack-graphs/src/arena.rs

@@ -188,6 +188,7 @@ impl<T> Arena<T> {
         self.items.truncate(1);
     }
 
+    // __NOMIC_FOUNDATION_FORK__ (added this function)
     pub(crate) fn truncate(&mut self, new_len: usize) {
         self.items.truncate(new_len);
     }

stack-graphs/src/partial.rs

@@ -2632,6 +2632,7 @@ impl PartialPaths {
         self.partial_path_edges.clear();
     }
 
+    // __NOMIC_FOUNDATION_FORK__ (added this function)
     pub fn save_checkpoint(&self) -> PartialPathsCheckpoint {
         PartialPathsCheckpoint {
             partial_symbol_stacks_len: self.partial_symbol_stacks.len(),
@@ -2640,6 +2641,7 @@ impl PartialPaths {
         }
     }
 
+    // __NOMIC_FOUNDATION_FORK__ (added this function)
     pub fn restore_checkpoint(&mut self, checkpoint: PartialPathsCheckpoint) {
         self.partial_symbol_stacks
             .truncate(checkpoint.partial_symbol_stacks_len);
@@ -2650,6 +2652,7 @@ impl PartialPaths {
     }
 }
 
+// __NOMIC_FOUNDATION_FORK__ (added this struct)
 pub struct PartialPathsCheckpoint {
     partial_symbol_stacks_len: usize,
     partial_scope_stacks_len: usize,