normalise catch block parameter names

content/bookmarks.js

@@ -180,7 +180,10 @@ vimperator.Bookmarks = function () //{{{
                 var count = {};
                 bookmarksService.getBookmarkIdsForURI(uri, count);
             }
-            catch (e) { return false; }
+            catch (e)
+            {
+                return false;
+            }
 
             return count.value > 0;
         },

content/buffers.js

@@ -563,7 +563,7 @@ vimperator.Buffer = function () //{{{
                         urlSecurityCheck(data.href, principal,
                                 Components.interfaces.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
                     }
-                    catch (ex)
+                    catch (e)
                     {
                         isFeed = false;
                     }
@@ -611,13 +611,13 @@ vimperator.Buffer = function () //{{{
             {
                 var cacheEntryDescriptor = httpCacheSession.openCacheEntry(cacheKey, ACCESS_READ, false);
             }
-            catch (ex)
+            catch (e)
             {
                 try
                 {
                     cacheEntryDescriptor = ftpCacheSession.openCacheEntry(cacheKey, ACCESS_READ, false);
                 }
-                catch (ex2) { }
+                catch (e) { }
             }
 
             var pageSize = []; // [0] bytes; [1] kbytes

content/commands.js

@@ -696,9 +696,9 @@ vimperator.Commands = function () //{{{
                 default: vimperator.echoerr("Dialog '" + args + "' not available");
                 }
             }
-            catch (err)
+            catch (e)
             {
-                vimperator.echoerr("Error opening '" + args + "': " + err);
+                vimperator.echoerr("Error opening '" + args + "': " + e);
             }
         },
         {