diff --git a/README.md b/README.md
index b0b61a8..f527355 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,8 @@
 Maps may values of any type, including nested maps.  Lists and maps may have
 trailing commas after the last value.
 
+Strings can contain double quotes using `\"`, for example `"cat \"a b\""`.
+
 ### Operators
 
 Strings, lists of strings, and maps can be appended using the `+` operator.
diff --git a/java/droiddoc.go b/java/droiddoc.go
index fd7e2a4..57da6b6 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -211,6 +211,7 @@
 	// Available variables for substitution:
 	//
 	//  $(location <label>): the path to the arg_files with name <label>
+	//  $$: a literal $
 	Args *string
 
 	// names of the output files used in args that will be generated