diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index a53b5d2..ec4030e 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 8.0.  Last change: 2017 Jan 08
+*eval.txt*	For Vim version 8.0.  Last change: 2017 Jan 14
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5256,6 +5256,7 @@
 		- A trailing comma in an array and object is ignored.
 		- More floating point numbers are recognized, e.g. "1." for
 		  "1.0".
+		However, a duplicate key in an object is not allowed. *E938*
 		The result must be a valid Vim type:
 		- An empty object member name is not allowed.
 		- Duplicate object member names are not allowed.
@@ -7249,7 +7250,7 @@
 		Like |strpart()| but using character index and length instead
 		of byte index and length.
 		When a character index is used where a character does not
-		exist it is assumed to be one byte.  For example: >
+		exist it is assumed to be one character.  For example: >
 			strcharpart('abc', -1, 2)
 <		results in 'a'.