style(core): fix constructor initializer list style

src/libs/core/application.cpp

@@ -52,8 +52,8 @@ const char ReleasesApiUrl[] = "https://api.zealdocs.org/v1/releases";
 
 Application *Application::m_instance = nullptr;
 
-Application::Application(QObject *parent) :
-    QObject(parent)
+Application::Application(QObject *parent)
+    : QObject(parent)
 {
     // Ensure only one instance of Application
     Q_ASSERT(!m_instance);

src/libs/core/extractor.cpp

@@ -31,8 +31,8 @@
 
 using namespace Zeal::Core;
 
-Extractor::Extractor(QObject *parent) :
-    QObject(parent)
+Extractor::Extractor(QObject *parent)
+    : QObject(parent)
 {
 }
 

src/libs/core/settings.cpp

@@ -47,8 +47,8 @@ const char GroupProxy[] = "proxy";
 
 using namespace Zeal::Core;
 
-Settings::Settings(QObject *parent) :
-    QObject(parent)
+Settings::Settings(QObject *parent)
+    : QObject(parent)
 {
     qRegisterMetaTypeStreamOperators<ExternalLinkPolicy>("ExternalLinkPolicy");