Fixes typos/out of date comments, switches to unstable sort

lib/std/debug.zig

@@ -606,8 +606,6 @@ fn waitForOtherThreadToFinishPanicking() void {
     }
 }
 
-/// This data structure is used by the Zig language code generation and
-/// therefore must be kept in sync with the compiler implementation.
 pub const StackTrace = struct {
     /// Each element is the "return address" of a function call, meaning the instruction address
     /// which control flow will return to when the function returns.

lib/std/debug/Pdb.zig

@@ -518,7 +518,7 @@ pub const BinaryAnnotation = union(enum) {
         }
     }
 
-    // Adapated from:
+    // Adapted from:
     // https://github.com/microsoft/microsoft-pdb/blob/805655a28bd8198004be2ac27e6e0290121a5e89/include/cvinfo.h#L4942
     pub fn takePackedU32(reader: *Io.Reader) Io.Reader.Error!u32 {
         const b0: u32 = try reader.takeByte();
@@ -866,7 +866,7 @@ pub fn getModule(self: *Pdb, index: usize) !?*Module {
             }
         }
 
-        std.mem.sort(InlineeSourceLine, inlinee_source_lines.items, {}, InlineeSourceLine.lessThan);
+        std.mem.sortUnstable(InlineeSourceLine, inlinee_source_lines.items, {}, InlineeSourceLine.lessThan);
         break :b try inlinee_source_lines.toOwnedSlice(gpa);
     };
     errdefer gpa.free(mod.inlinee_source_lines);