templater: tokenize decimal integer literal (
issue4638) (BC)
Before this patch, we had to quote integer literals to pass to template
functions. It was error-prone, so we should allow "word(0, x)" syntax.
Currently only decimal integers are allowed. It's easy to support 0x, 0b and 0
prefixes, but I don't think they are useful.
This patch assumes that template keywords and names defined in map files do
not start with digits, except for positional variables seen in the schemes
extension.