added diff.nim to the stdlib

changelog.md

@@ -86,6 +86,9 @@ proc enumToString*(enums: openArray[enum]): string =
 - Added `macros.isInstantiationOf` for checking if the proc symbol
   is instantiation of generic proc symbol.
 
+- There is a new stdlib mdoule `std/diff` to compute the famous "diff"
+  of two texts by line.
+
 
 ### Library changes
 

doc/lib.rst

@@ -154,6 +154,10 @@ String handling
 * `std/wordwrap <wordwrap.html>`_
   This module contains an algorithm to wordwrap a Unicode string.
 
+* `std/diff <diff.html>`_
+  This module contains an algorithm to compute the famous "diff"
+  of two texts by line.
+
 
 Generic Operating System Services
 ---------------------------------

tools/kochdocs.nim

@@ -129,6 +129,7 @@ lib/pure/math.nim
 lib/pure/matchers.nim
 lib/std/editdistance.nim
 lib/std/wordwrap.nim
+lib/std/diff.nim
 lib/pure/algorithm.nim
 lib/pure/stats.nim
 lib/windows/winlean.nim