Merge commit 'e509cac533600cf4fa8382c9cdab78ddd82db688'

docs/content/en/functions/collections/SymDiff.md

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+---
+title: collections.SymDiff
+linkTitle: symdiff
+description: Returns the symmetric difference of two collections.
+categories: [functions]
+keywords: []
+menu:
+  docs:
+    parent: functions
+function:
+  aliases: [symdiff]
+  returnType: any
+  signatures: [COLLECTION | collections.SymDiff COLLECTION]
+relatedFunctions:
+  - collections.Complement
+  - collections.Intersect
+  - collections.SymDiff
+  - collections.Union
+aliases: [/functions/symdiff]
+---
+
+Example:
+
+```go-html-template
+{{ slice 1 2 3 | symdiff (slice 3 4) }} → [1 2 4]
+```
+
+Also see https://en.wikipedia.org/wiki/Symmetric_difference