Fix #2197 extended regex pattern example
diff --git a/docs/content/manual/manual.yml b/docs/content/manual/manual.yml
index 7a91d1e..894f2ef 100644
--- a/docs/content/manual/manual.yml
+++ b/docs/content/manual/manual.yml
@@ -2260,7 +2260,7 @@
 
       To match whitespace in an x pattern use an escape such as \s, e.g.
 
-      * test( "a\\sb", "x" ).
+      * test( "a\\\\sb"; "x" )
 
       Note that certain flags may also be specified within REGEX, e.g.
 
diff --git a/docs/content/manual/v1.5/manual.yml b/docs/content/manual/v1.5/manual.yml
index fe2c95a..62a68e9 100644
--- a/docs/content/manual/v1.5/manual.yml
+++ b/docs/content/manual/v1.5/manual.yml
@@ -1987,7 +1987,7 @@
 
       To match whitespace in an x pattern use an escape such as \s, e.g.
 
-      * test( "a\\sb", "x" ).
+      * test( "a\\\\sb"; "x" )
 
       Note that certain flags may also be specified within REGEX, e.g.
 
diff --git a/docs/content/manual/v1.6/manual.yml b/docs/content/manual/v1.6/manual.yml
index eceff36..c649068 100644
--- a/docs/content/manual/v1.6/manual.yml
+++ b/docs/content/manual/v1.6/manual.yml
@@ -2280,7 +2280,7 @@
 
       To match whitespace in an x pattern use an escape such as \s, e.g.
 
-      * test( "a\\sb", "x" ).
+      * test( "a\\\\sb"; "x" )
 
       Note that certain flags may also be specified within REGEX, e.g.