diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index b1176a0..418b64c 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -3135,8 +3135,10 @@
 conceal						*conceal* *:syn-conceal*
 
 When the "conceal" argument is given, the item is marked as concealable.
-Whether or not it is actually concealed depends on the setting on the
-'conceallevel' option.
+Whether or not it is actually concealed depends on the value of the
+'conceallevel' option.  If 'modifiable' option is on, concealable items
+in the current line are always displayed unconcealed to be able to edit
+the line.
 
 concealends						*:syn-concealends*
 
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 2405457..06be30b 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1088,11 +1088,8 @@
 - using NSIS 2.46: install on Windows 7 works, but no "Edit with Vim" menu.
    Use register_shell_extension()? (George Reilly, 2010 May 26)
    Ron's version: http://dev.ronware.org/p/vim/finfo?name=gvim.nsi
-- Patch for conceal feature and 'foldcolumn'. (Dominique Pelle, 2010 Jun 10,
-  second patch)
-  Also patch from Vince, 2010 Jun 15.  And another June 16.
+- Patch for conceal from Vince, 2010 Jun 15.  And another June 16.
   However: more generic patch on the way.
-- patch for conceal feature and 'modifiable'. (Dominique Pelle, 2010 Jun 9)
 - undofile: keep markers where the file was written/read, so that it's easy to
   go back to a saved version of the file:  ":earlier 1f" (f for file)?
   Also add ":earlier 1d" (d for day).