diff --git a/docs/literate.txt b/docs/literate.txt
index 148ba3c..340f7e5 100644
--- a/docs/literate.txt
+++ b/docs/literate.txt
@@ -82,14 +82,20 @@
 else (or just unset entirely). You can also use a quoted literal block,
 although you'll end up with the quoting character inside the result.
 
-To avoid a dependency on an entire reST parser, we place a small
-constraint on the specific syntax of the directive line. The code
-directives must start on their own line and match the following regular
-expression, with whitespace appearing at any point in the line:
+To avoid a dependency on an entire reST parser, we actually identify
+things that are not proper reST when looking for the ..code:: marker.
+The code directives must start on their own line and match the following
+string, with whitespace appearing at any point in the line:
 
     ..code::ubik
 
 The code must start on a new line after the directive, and all lines are
-taken until a line with no indentation is found again. This is slightly
-less flexible than the reST spec usually allows you to be, but it
-simplifies the implementation of the weave operation significantly.
+taken until a line with no indentation is found again. This is more
+permissive than the reST spec, but it simplifies the implementation of
+the weave operation significantly. The following markers are all valid:
+
+    .. code :: ubik
+    . . c o d e : : u b i k
+    .               .code:         :ubik
+    ..code::ubi k
+