make pdf on arm-none-eabi targets fails to build after the reorganization in
baf0c9fcb56e5cf8f54357bf8d8646b51b236886 to fold is*_l documentation in their
is* counterpart. This is due two issues:
1) newlib/libc/ctype/ctype.tex still including the def file for the long versions
2) missing angle brackets in .c files for some of is*_l functions
This patch fixes the issues and allows make pdf to succeeds.
0e2e3c958c