developer/new-developers/qt-qml-testing-tools: cleanup

Follow-up patch: https://review.jami.net/c/jami-docs/+/30003

Change-Id: I8639e6e772dfe27e68631a494cdfc6b5fa4d3ea7

developer/new-developers/qt-qml-testing-tools.md

 # Qt and QML testing tools
 
-
 ## QML
 
 qml_tests launch all the tests related to the interface.
@@ -9,7 +8,6 @@ Ideally, mock data should be used to avoid depending on network events.
 This may be difficult sometimes, and some tools may be missed because tests in this part are a work in progress.
 Here are some tools and principles to enable tests to be written quickly.
 
-
 ### Mock data
 
 Say a UI test for the AccountComboBox depending on a list of accounts is required.
@@ -85,20 +83,16 @@ TestWrapper {
 }
 ```
 
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 ## C++
 
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 ### GoogleTest
 
 [GoogleTest](https://google.github.io/googletest/) is Google’s C++ testing and mocking framework.
 
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 #### Installation
 - Ubuntu / Debian:
 `apt install googletest libgtest-dev`
 
-
 ### Example main.cpp
 ```
 #include <gtest/gtest.h>
@@ -118,13 +112,10 @@ int main(int argc, char *argv[])
 }
 ```
 
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 ## QML
 
-
 ### QtQuickTest
 
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 #### Installation
 - Ubuntu / Debian: `apt install qml-module-qqtest libqt5quicktest5`
 
@@ -150,4 +141,4 @@ public slots:
 
 QUICK_TEST_MAIN_WITH_SETUP(testqml, Setup)
 #include "main.moc"
-```
+```
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