message: memo: fixed Doxygen warnings
  Apparently, using "\n" inside an alias is an error now, but "^^" basically means the same.
diff: -# Doxyfile 1.8.14
  +# Doxyfile 1.8.15
  #---------------------------------------------------------------------------
  # Project related configuration options
  @@ -12,6 +12,7 @@ OUTPUT_DIRECTORY = .
  CREATE_SUBDIRS = NO
  ALLOW_UNICODE_NAMES = NO
  OUTPUT_LANGUAGE = English
  +OUTPUT_TEXT_DIRECTION = None
  BRIEF_MEMBER_DESC = YES
  REPEAT_BRIEF = NO
  ABBREVIATE_BRIEF =
  @@ -27,11 +28,11 @@ MULTILINE_CPP_IS_BRIEF = NO
  INHERIT_DOCS = YES
  SEPARATE_MEMBER_PAGES = YES
  TAB_SIZE = 4
  -ALIASES = "complexity=@par Complexity\n" \
  - "liveexample{2}=@par Example\n \1 \n @includelineno \2.cpp \n Output (play with this example @htmlinclude \2.link):\n @verbinclude \2.output \n The <a href= https://github.com/nlohmann/json/blob/develop/doc/examples/\2.cpp>example code</a> above can be translated with @verbatim g++ -std=c++11 -Isrc doc/examples/\2.cpp -o \2 @endverbatim" \
  - "requirement=@par Requirements\n" \
  - "exceptionsafety=@par Exception safety\n" \
  - "iterators=@par Iterator validity\n"
  +ALIASES = "complexity=@par Complexity^^" \
  + "liveexample{2}=@par Example^^ \1 ^^ @includelineno \2.cpp \n Output (play with this example @htmlinclude \2.link):^^ @verbinclude \2.output ^^ The <a href= https://github.com/nlohmann/json/blob/develop/doc/examples/\2.cpp>example code</a> above can be translated with @verbatim g++ -std=c++11 -Isrc doc/examples/\2.cpp -o \2 @endverbatim" \
  + "requirement=@par Requirements^^" \
  + "exceptionsafety=@par Exception safety^^" \
  + "iterators=@par Iterator validity^^"
  TCL_SUBST =
  OPTIMIZE_OUTPUT_FOR_C = NO
  OPTIMIZE_OUTPUT_JAVA = NO
  @@ -107,7 +108,8 @@ WARN_LOGFILE =
  # Configuration options related to the input files
  #---------------------------------------------------------------------------
  INPUT = ../src/json.hpp \
  - index.md faq.md
  + index.md \
  + faq.md
  INPUT_ENCODING = UTF-8
  FILE_PATTERNS =
  RECURSIVE = NO
  @@ -138,6 +140,7 @@ USE_HTAGS = NO
  VERBATIM_HEADERS = NO
  CLANG_ASSISTED_PARSING = YES
  CLANG_OPTIONS = -std=c++11
  +CLANG_COMPILATION_DATABASE_PATH = 0
  #---------------------------------------------------------------------------
  # Configuration options related to the alphabetical class index
  #---------------------------------------------------------------------------
  