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util.format: Escape ASCII control characters in output

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This should offer some protection against doing evil things to
terminals. Doesn't protect against pure broken UTF-8 garbage however.

See #734
This commit is contained in:
Kim Alvefur 2021-06-15 23:24:23 +02:00
parent e21e4b2b24
commit 3f1d93bb4e
2 changed files with 21 additions and 1 deletions
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5
spec/util_format_spec.lua
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@ -15,5 +15,10 @@ describe("util.format", function()
assert.equal("[1.5]", format("%d", 1.5));
assert.equal("[7.3786976294838e+19]", format("%d", 73786976294838206464));
end);
it("escapes ascii control stuff", function ()
assert.equal("␁", format("%s", "\1"));
end);
end);
end);