[clang] [rtsan] NFC: Update docs with suppress_equal_stacks (PR #117187)

[Chris Apple via cfe-commits]

https://github.com/cjappl created https://github.com/llvm/llvm-project/pull/117187

None

>From b5888f70bd1bbefc6a711ef2022478980ed2505f Mon Sep 17 00:00:00 2001
From: Chris Apple <cja-private at pm.me>
Date: Thu, 21 Nov 2024 08:45:33 -0800
Subject: [PATCH] [rtsan] NFC: Update docs with suppress_equal_stacks

---
 clang/docs/RealtimeSanitizer.rst | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/clang/docs/RealtimeSanitizer.rst b/clang/docs/RealtimeSanitizer.rst
index 5431e38fea62ec..233a91f6684162 100644
--- a/clang/docs/RealtimeSanitizer.rst
+++ b/clang/docs/RealtimeSanitizer.rst
@@ -167,7 +167,11 @@ A **partial** list of flags RealtimeSanitizer respects:
    * - ``halt_on_error``
      - ``true``
      - boolean
-     - Exit after first reported error. If false (continue after a detected error), deduplicates error stacks so errors appear only once.
+     - Exit after first reported error.
+   * - ``suppress_equal_stacks``
+     - ``true``
+     - boolean
+     - If true, suppress duplicate reports (i.e. only print each unique error once). Only particularly useful when ``halt_on_error=false``.
    * - ``print_stats_on_exit``
      - ``false``
      - boolean