tpl/transform: Add template func for TOML/JSON/YAML docs examples conversion

Usage:

```html
{{ "title = \"Hello World\"" | transform.Remarshal "json" | safeHTML }}
```

Fixes #4389

1 files changed, 6 insertions, 0 deletions

diff --git a/helpers/general.go b/helpers/general.go
index 3d4396440..da05548f4 100644
--- a/helpers/general.go
+++ b/helpers/general.go
@@ -465,3 +465,9 @@ func DiffStringSlices(slice1 []string, slice2 []string) []string {
 
 	return diffStr
 }
+
+// DiffString splits the strings into fields and runs it into DiffStringSlices.
+// Useful for tests.
+func DiffStrings(s1, s2 string) []string {
+	return DiffStringSlices(strings.Fields(s1), strings.Fields(s2))
+}