All these files should be sourced, not executed; and Debian's lintian complains: W: zsh-syntax-highlighting: script-not-executable usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
Highlight the last character of a «\xHH» escape when it is the last thing in LBUFFER. This is similar to what b0cc02ed86 did for issue #186.
b0cc02ed86