Cleanup formatting

Wew, that's a lot of stuff. But I thought it makes sense after the
sysrepo migration.

Change-Id: If363d2ce1b11106113a9f0c37a3bcd59a940bd0b
diff --git a/src/ast_handlers.cpp b/src/ast_handlers.cpp
index b77964b..6fde52c 100644
--- a/src/ast_handlers.cpp
+++ b/src/ast_handlers.cpp
@@ -26,5 +26,5 @@
 
 boost::optional<std::string> optModuleToOptString(const boost::optional<module_> module)
 {
-    return module.flat_map([] (const auto& module) { return boost::optional<std::string>(module.m_name); });
+    return module.flat_map([](const auto& module) { return boost::optional<std::string>(module.m_name); });
 }