fixed: Server side spell checker errors when checking text with single quotes

docs/changelog/7.x.x.txt

@@ -1,4 +1,5 @@
 7.6.0
+ - fixed: Server side spell checker errors when checking text with single quotes
  - remove Do Nothing On Delete workflow and allow none to be selected for on delete etc workflow
  - remove remnants of realtime workflow selection code
  - fixed: Asset view time format problem

lib/WebGUI/Operation/SpellCheck.pm

@@ -196,6 +196,10 @@ sub www_spellCheck {
     while ($session->request->read(my $buffer, 1024)) {
         $data .= $buffer;
     }
+
+    # work around TinyMCE JSON encoding bug
+    $data =~ s/([^\\](?:\\\\)*)\\'/$1'/g;
+
     my $params = JSON->new->utf8->decode($data);
 
     my $result;