CMake: Apply editorconfig formatting

Externals/cpp-optparse/CMakeLists.txt

@@ -1,6 +1,6 @@
 set(SRCS
-    cpp-optparse/OptionParser.cpp
-    cpp-optparse/OptionParser.h
+  cpp-optparse/OptionParser.cpp
+  cpp-optparse/OptionParser.h
 )
 
 add_library(cpp-optparse STATIC ${SRCS})
@@ -10,5 +10,5 @@ dolphin_disable_warnings(cpp-optparse)
 
 target_include_directories(cpp-optparse
 PUBLIC
-    ${CMAKE_CURRENT_SOURCE_DIR}/cpp-optparse
+  ${CMAKE_CURRENT_SOURCE_DIR}/cpp-optparse
 )