updated for version 7.0020
diff --git a/runtime/doc/fold.txt b/runtime/doc/fold.txt
index 00f5474..6644439 100644
--- a/runtime/doc/fold.txt
+++ b/runtime/doc/fold.txt
@@ -1,4 +1,4 @@
-*fold.txt* For Vim version 7.0aa. Last change: 2004 Jun 14
+*fold.txt* For Vim version 7.0aa. Last change: 2004 Oct 15
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -190,11 +190,11 @@
3. if a marker with a lower fold level is found, all folds up to and including
this level end and a fold with the specified level starts.
-The number indicates the fold level. A zero cannot be used.
-You can use "}}}" with a digit to indicate the level of the fold that
-ends. The fold level of the following line will be one less than the
-indicated level. Note that Vim doesn't look back to the level of the matching
-marker (that would take too much time). Example: >
+The number indicates the fold level. A zero cannot be used (a marker with
+level zero is ignored). You can use "}}}" with a digit to indicate the level
+of the fold that ends. The fold level of the following line will be one less
+than the indicated level. Note that Vim doesn't look back to the level of the
+matching marker (that would take too much time). Example: >
{{{1
fold level here is 1