Make newline explicit

Author: petk

cmake/ext/mbstring/CMakeLists.txt

@@ -109,8 +109,7 @@ set(LIBMBFL_NAMESPACE php_mbstring_libmbfl)
 add_subdirectory(libmbfl EXCLUDE_FROM_ALL)
 target_link_libraries(php_mbstring PRIVATE ${LIBMBFL_NAMESPACE})
 
-file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/libmbfl/config.h [[
-
+file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/libmbfl/config.h "\n" [[
 #ifdef _WIN32
 # define HAVE_STRICMP 1
 # include <config.w32.h>