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cex: don't assume the terminal supports "•"

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Use of print_unicode_char suggested by Bruno Haible.
https://lists.gnu.org/r/bug-gettext/2020-06/msg00012.html

* src/gram.h (print_dot_fallback, print_dot): New.
* src/gram.c, src/derivation.c: Use it.
* tests/counterexample.at, tests/report.at: Adjust the test suite.
* .travis.yml, README-hacking.md: Adjust.
This commit is contained in:
Akim Demaille
2020-06-14 09:13:39 +02:00
parent c35e829a76
commit e077bf1ebc
15 changed files with 245 additions and 179 deletions
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src/derivation.c
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@@ -167,7 +167,7 @@ derivation_print_impl (const derivation *deriv, FILE *f,
else if (deriv == &d_dot)
{
begin_use_class ("cex-dot", f);
fputs ("•", f);
print_dot (f);
end_use_class ("cex-dot", f);
}
else // leaf.