From 1aecce5936db9424cf526c565ef2501f21109b95 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Mon, 11 Aug 2025 11:35:53 +0100
Subject: [PATCH] doc: Add `--merge-mode-functions=separate` option to `gcovr`
 invocations

Otherwise, commands fail with the error:
```
Stderr of gcov was >><< End of stderr
Exception was >>Got function secp256k1_scalar_split_lambda on multiple lines: 67, 142.
	You can run gcovr with --merge-mode-functions=MERGE_MODE.
	The available values for MERGE_MODE are described in the documentation.<< End of stderr
```
---
 CONTRIBUTING.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ccc1af63..9462b30d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -92,12 +92,12 @@ Run the tests:
 
 To create a report, `gcovr` is recommended, as it includes branch coverage reporting:
 
-    $ gcovr --exclude 'src/bench*' --exclude 'src/modules/.*/bench_impl.h' --print-summary
+    $ gcovr --merge-mode-functions=separate --exclude 'src/bench*' --exclude 'src/modules/.*/bench_impl.h' --print-summary
 
 To create a HTML report with coloured and annotated source code:
 
     $ mkdir -p coverage
-    $ gcovr --exclude 'src/bench*' --exclude 'src/modules/.*/bench_impl.h' --html --html-details -o coverage/coverage.html
+    $ gcovr --merge-mode-functions=separate --exclude 'src/bench*' --exclude 'src/modules/.*/bench_impl.h' --html --html-details -o coverage/coverage.html
 
 #### Exhaustive tests