Merge branch 'master' into kitagawa_test; also fix \ltj@@IsFontJapaneseX.

The change of 1c95edd doesn't work in math mode (catcode issue?).

diff --cc src/patches/lltjfont.sty
index 7baab1e,70cace2..de5e38e
--- 1/src/patches/lltjfont.sty
--- 2/src/lltjfont.sty
+++ b/src/patches/lltjfont.sty
@@@ -569,7 -586,7 +569,9 @@@
    \expandafter\ltj@@IsFontJapaneseX#1//:%
    \expandafter\expandafter\expandafter
    \inlist@\expandafter\tmp@item\expandafter{\kenc@list}}
- \def\ltj@@IsFontJapaneseX#1/#2/:{\edef\tmp@item{{\directlua{tex.write('#1')}}}}
 -\def\ltj@@IsFontJapaneseX#1/#2/:{\edef\tmp@item{{\directlua{tex.print('#1')}}}}
++\def\ltj@@IsFontJapaneseX#1/#2/:{\edef\tmp@item{{\directlua{%
++  tex.print(luatexbase.catcodetables["latex-package"], '#1')}%
++}}}
  
  
  \let\extract@afont\extract@font