HandleBars.Compile replaces '\\' (double backslash) with '\' single backslash

[bascoder]

What

When the template contains a double backslash. The result only contains a single backslash.

Reproduction

To reproduce I wrote the following unit test:

[TestMethod]
public void Compile_WithDoubleBackslashes_ReturnsExpectedString()
{
    string template = @"\\";
    
    var compiledTemplate = Handlebars.Compile(template);
    string result = compiledTemplate(null);

    Assert.AreEqual(@"\\", result);
}

It fails with message:
Assert.AreEqual failed. Expected:<\\>. Actual:<\>.

Here I would expect that the result string contains the double backslash.

Workaround

To workaround this issue I can change the template to string template = @"\\\\".

[oformaniuk]

Duplicate/related: #349

[oformaniuk]

May be considered as a breaking change as this was the behavior from the day one and many users may be impacted.
Fix may require feature flag to switch to new behavior (or to previous behavior, up to the contributor).

[oformaniuk]

#348
-- may be used as a starting point for the fix.

[oformaniuk]

Hello @xcskilab
Can you provide more details on your question as I'm not completely sure what context you're asking in?