Add russian docs

docs/ru/mods/split.md

@@ -0,0 +1,18 @@
+Modifier split
+==============
+
+Split a string by string
+
+```
+{$string|split:$delimiter = ","}
+```
+
+Returns an array of strings, each of which is a substring of `$string` formed by splitting it on boundaries formed by the string `$delimiter`.
+
+```smarty
+{var $fruits1 = "banana,apple,pear"|split}
+$fruits1 is array ["banana", "apple", "pear"]
+
+{var $fruits2 = "banana,apple,pear"|split:',apple,'}
+$fruits2 is array ["banana", "pear"]
+```