linkify: avoid digits and dashes in placeholders

The `highlight' module seems to highlight every digit in
YAML (and possibly other) source files.  This causes problems
in linkify_2 which replaces the placeholders with proper URIs.
I suspect `-' and other punctuation characters will cause
similar problems, so we must stick to [A-Za-z].

Thus transliterate 0-9 to A-J in the hex key to ensure highlight
doesn't see digit characters, and rename the prefix to be
project-name independent.

0 files changed, 0 insertions, 0 deletions