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02eaddc2fb
Before this commit, due to a bug in Go's `text/template` package, this would print different output for typed nil interface values:
```
{{ if .AuthenticatedUser }}User is authenticated!{{ else }}{{ end }}
{{ if not .AuthenticatedUser }}{{ else }}}User is authenticated!{{ end }}
```
This commit works around this by wrapping every `if` and `with` with a custom `getif` template func with truth logic that matches `not`, `and` and `or`.
Those 3 template funcs from Go's stdlib are now pulled into Hugo's source tree and adjusted to support custom zero values, e.g. types that implement `IsZero`.
This means that you can now do:
```
{{ with .Date }}{{ . }}{{ end }}
```
And it would work as expected.
Fixes #5738
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| .. | ||
| cast | ||
| collections | ||
| compare | ||
| crypto | ||
| data | ||
| encoding | ||
| fmt | ||
| hugo | ||
| images | ||
| inflect | ||
| internal | ||
| lang | ||
| math | ||
| os | ||
| partials | ||
| path | ||
| reflect | ||
| resources | ||
| safe | ||
| site | ||
| strings | ||
| templates | ||
| time | ||
| tplimpl | ||
| transform | ||
| urls | ||
| template.go | ||
| template_test.go | ||