Options now respect new version of Code checker 2.9

Překlep...

Texy produces the right pair for the page locale, so the source only ever needs
", ' and -. Hand typed characters kept producing broken pairs such as „text"
that nothing reported, and in a mutation they stayed in the shape of a foreign
language even where Texy would have made another one.

The en dash conversion is invisible in the output: Texy makes it again from a
hyphen between spaces or digits. What does disappear are the em dashes, 14 of
them, and where one stood between words with no spaces, spaces were added so it
would not turn into a hyphen.

Two cases changed on purpose beyond that: key-value and test- now use a hyphen,
which is what belongs there, and a Czech quote pair typed by hand into an
English page in migrations now renders with English quotes.

Also protected the --watch flag in tester with backticks. Outside backticks
Texy reads the two hyphens as a dash, so the page documented a flag spelled
with a dash.

Code blocks, inline code and ''raw'' are left alone, and so are the values of
{{maintitle}} and {{description}}, which are printed verbatim: there a dash
would vanish from the output too, and that calls for rewriting the sentence.

Verified by rendering every changed page through Texy 3.2.8 before and after:
8225 lines identical, 38 differing only in typography, no structural change.
Line counts and language alignment are untouched.