extract_grammar symnames

add missing symnames

Signed-off-by: Jan Kobler <eng1@koblersystems.de>
insert space

in the rust grammar

to avoid error messages like this:

  Exception: non-alpha apparent keyword: pub"

when using extract_grammar.py:

python2.7 src/etc/extract_grammar.py <doc/rust.md

Signed-off-by: Jan Kobler <eng1@koblersystems.de>
auto merge of #8585 : jankobler/rust/extract-grammar-01, r=catamorphism

This fixes some errors which extract_grammar.py reports, when called with

python2.7 src/etc/extract_grammar.py <doc/rust.md