Keep consistent formatting

CMakeLists.txt

@@ -12,7 +12,7 @@ project(nlohmann_json VERSION 3.9.1 LANGUAGES CXX)
 ##
 set(MAIN_PROJECT OFF)
 if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
-  set(MAIN_PROJECT ON)
+    set(MAIN_PROJECT ON)
 endif()
 
 ##
@@ -113,8 +113,8 @@ endif()
 
 # Install a pkg-config file, so other tools can find this.
 CONFIGURE_FILE(
-  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pkg-config.pc.in"
-  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pkg-config.pc.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
 )
 
 ##
@@ -160,7 +160,7 @@ if(JSON_Install)
             FILES ${NLOHMANN_NATVIS_FILE}
             DESTINATION .
     )
-endif()
+    endif() # NLOHMANN_ADD_NATVIS
     export(
         TARGETS ${NLOHMANN_JSON_TARGET_NAME}
         NAMESPACE ${PROJECT_NAME}::
@@ -180,4 +180,4 @@ endif()
         FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
         DESTINATION ${NLOHMANN_JSON_PKGCONFIG_INSTALL_DIR}
     )
-endif()
+endif() # JSON_Install