Curly braces cause documentation build failure with texinfo 7.1 (works
fine
up to 7.0.3):

-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --

---------- newlib-4.3.0.20230120 make install-pdf
  TEXI2PDF libc/libc.pdf
libc.texi:74: misplaced {
libc.texi:74: misplaced }
libc.texi:75: misplaced {
libc.texi:75: misplaced }
libc.texi:76: misplaced {
libc.texi:76: misplaced }
libc.texi:77: misplaced {
libc.texi:77: misplaced }
make: *** [Makefile:47789: libc/libc.pdf] Error 1

-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --