Initial community commit

Src/external_dependencies/openmpt-trunk/include/premake/website/docs/table.flatten.md

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+Flattens a hierarchy of arrays into a single array containing all of the values.
+
+```lua
+table.flatten(arr)
+```
+
+### Parameters ###
+
+`arr` is an table containing indexed values, which may themselves also contain indexed values.
+
+
+### Return Value ###
+
+A new array containing all of the elements, nested or otherwise.
+
+
+### Availability ###
+
+Premake 5.0 or later.
+
+### Examples ###
+
+```lua
+-- returns { "A", "B", "C", "D" }
+flat = table.flatten { "A", { "B", "C", { "D" } } }
+```