Added uints to Leaf nodes

[This question on SO](http://stackoverflow.com/questions/30311110/how-to-create-a-nnkuint16lit-nimnode) made me realized these weren't in there

1 files changed, 4 insertions, 0 deletions

diff --git a/doc/astspec.txt b/doc/astspec.txt
index 7514838da..596d07bab 100644
--- a/doc/astspec.txt
+++ b/doc/astspec.txt
@@ -60,6 +60,10 @@ Nim expression                   Corresponding AST
 ``42'i16``                       ``nnkInt16Lit(intVal = 42)``
 ``42'i32``                       ``nnkInt32Lit(intVal = 42)``
 ``42'i64``                       ``nnkInt64Lit(intVal = 42)``
+``42'u8``                        ``nnkUInt8Lit(intVal = 42)``
+``42'u16``                       ``nnkUInt16Lit(intVal = 42)``
+``42'u32``                       ``nnkUInt32Lit(intVal = 42)``
+``42'u64``                       ``nnkUInt64Lit(intVal = 42)``
 ``42.0``                         ``nnkFloatLit(floatVal = 42.0)``
 ``42.0'f32``                     ``nnkFloat32Lit(floatVal = 42.0)``
 ``42.0'f64``                     ``nnkFloat64Lit(floatVal = 42.0)``