cleanup, docs

site/doc/pages/2_StringList_each.txt

@@ -2,15 +2,18 @@
 template<typename F> void StringList::each(F f) const
 
 :params
-f : callback called with each String
+f : callback called with each string
 return value : none
 
-:see
-0_StringList
-
 :content
-Calls the callback once for each string in order.
+Calls the callback once for each string in order. Use it when you want side effects such as building output or accumulating a separate value.
 
-```cpp
+:example
+StringList items = split("a,b,c", ",");
 items.each([](String item) { print(item, "\n"); });
-```
+
+:see
+>types
+0_StringList
+2_StringList_map
+2_StringList_keys