Issue #1170 More progress migrating adblockplus.org to our CMS.

locales/en/changelog-1.3.9.json

 {
   "title": {
     "message": "Detailed changelog for Adblock Plus 1.3.9"
   },
   "s1": {
-    "message": "The following lists the changes compared to Adblock Plus 1.3.8. If you experience issues\n  with this release please check <a>the list of known issues</a>."
+    "message": "The following lists the changes compared to Adblock Plus 1.3.8. If you experience issues with this release please check <a>the list of known issues</a>."
   },
   "s2": {
-    "message": "Added experimental support for Firefox Sync, enabled via \"Sync Adblock Plus settings\"\n    option (only visible if Firefox Sync is set up)."
+    "message": "Added experimental support for Firefox Sync, enabled via \"Sync Adblock Plus settings\" option (only visible if Firefox Sync is set up)."
   },
   "s3": {
     "message": "New extension icons (<a>forum topic</a>)."
   },
   "s4": {
     "message": "Updated for changes in Thunderbird 5."
   },
   "s5": {
-    "message": "Fixed: Disabled filters might stay effective if enabled from list of\n    blockable items (<a>forum topic</a>)."
+    "message": "Fixed: Disabled filters might stay effective if enabled from list of blockable items (<a>forum topic</a>)."
   },
   "s6": {
-    "message": "Fixed: Disabling on a page should ignore fragment identifier \n    (<a>forum topic</a>)."
+    "message": "Fixed: Disabling on a page should ignore fragment identifier  (<a>forum topic</a>)."
   },
   "s7": {
-    "message": "Fixed: Do-Not-Track feature causes an error message to appear\n    (<a>bug 24078</a>)."
+    "message": "Fixed: Do-Not-Track feature causes an error message to appear (<a>bug 24078</a>)."
   },
   "s8": {
     "message": "Two minor code bugs fixed."
   },
   "s9": {
     "message": "Changelog for the previous release"
   }
 }