diff --git a/module/VuFind/src/VuFind/DigitalContent/OverdriveConnector.php b/module/VuFind/src/VuFind/DigitalContent/OverdriveConnector.php
index e70cd2376f092da601b3ecebd0fc5b4a786a0b61..f60d0c8b3fe1158d27fb0164a2291ff01d07f352 100644
--- a/module/VuFind/src/VuFind/DigitalContent/OverdriveConnector.php
+++ b/module/VuFind/src/VuFind/DigitalContent/OverdriveConnector.php
@@ -195,7 +195,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                     = $this->getResultObject(true);
             } else {
                 $result = $this->getResultObject();
-                //there is some problem with the account
+                // there is some problem with the account
                 $result->code = "od_account_problem";
                 $conf = $this->getConfig();
 
@@ -205,12 +205,12 @@ class OverdriveConnector implements LoggerAwareInterface,
                         $conf->noAccessString
                     ) !== false
                     ) {
-                        //this user should not have access to OD
+                        // this user should not have access to OD
                         $result->code = "od_account_noaccess";
                     }
                 }
-                //odAccessMessage is set in the session by the API call above
-                //maybe it should be saved to a class property instead
+                // odAccessMessage is set in the session by the API call above
+                // maybe it should be saved to a class property instead
                 $result->msg = $this->getSessionContainer()->odAccessMessage;
                 $this->getSessionContainer()->odAccess = $result;
             }
@@ -243,8 +243,8 @@ class OverdriveConnector implements LoggerAwareInterface,
 
         if ($conf = $this->getConfig()) {
             $collectionToken = $this->getCollectionToken();
-            //hmm. no token.  if user is logged in let's check access
-            if (!$collectionToken && $user = $this->getUser()) {
+            // hmm. no token.  if user is logged in let's check access
+            if (!$collectionToken && $this->getUser()) {
                 $accessResult = $this->getAccess();
                 if (!$accessResult->status) {
                     return $accessResult;
@@ -258,9 +258,9 @@ class OverdriveConnector implements LoggerAwareInterface,
 
             if ($res->errorCode == "NotFound") {
                 if ($conf->consortiumSupport && !$this->getUser()) {
-                    //consortium support is turned on but user is not logged in;
-                    //if the title is not found it probably means that it's only
-                    //available to some users.
+                    // consortium support is turned on but user is not logged in;
+                    // if the title is not found it probably means that it's only
+                    // available to some users.
                     $result->status = true;
                     $result->code = 'od_code_login_for_avail';
                 } else {
@@ -303,8 +303,8 @@ class OverdriveConnector implements LoggerAwareInterface,
                 $loginRequired = true;
             }
             $collectionToken = $this->getCollectionToken();
-            //hmm. no token.  if user is logged in let's check access
-            if (!$collectionToken && $user = $this->getUser()) {
+            // hmm. no token.  if user is logged in let's check access
+            if (!$collectionToken && $this->getUser()) {
                 $accessResult = $this->getAccess();
                 if (!$accessResult->status) {
                     return $accessResult;
@@ -321,10 +321,10 @@ class OverdriveConnector implements LoggerAwareInterface,
             } else {
                 if ($res->errorCode == "NotFound" || $res->totalItems == 0) {
                     if ($loginRequired) {
-                        //consortium support is turned on but user is
-                        //not logged in
-                        //if the title is not found it could mean that it's only
-                        //available to some users.
+                        // consortium support is turned on but user is
+                        // not logged in
+                        // if the title is not found it could mean that it's only
+                        // available to some users.
                         $result->status = true;
                         $result->code = 'od_code_login_for_avail';
                     } else {
@@ -337,7 +337,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                         $this->debug("item:" . print_r($item, true));
                         $result->data[strtolower($item->reserveId)] = $item;
                     }
-                    //now look for items not returned
+                    // now look for items not returned
                     foreach ($overDriveIds as $id) {
                         if (!isset($result->data[$id])) {
                             if ($loginRequired) {
@@ -451,7 +451,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                     $result->status = true;
                     $result->data->expires = $expires;
                     $result->data->formats = $response->formats;
-                    //add the checkout to the session cache
+                    // add the checkout to the session cache
                     $this->getSessionContainer()->checkouts[] = $response;
                 } else {
                     $result->msg = $response->message;
@@ -526,7 +526,6 @@ class OverdriveConnector implements LoggerAwareInterface,
     {
         $holdResult = $this->getResultObject();
         $this->debug("OverdriveConnector: cancelHold");
-        //$this->debug(print_r($user,true));
         if (!$user = $this->getUser()) {
             $this->error("user is not logged in", false, true);
             return $holdResult;
@@ -538,7 +537,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                 "DELETE"
             );
 
-            //because this is a DELETE Call, we are just looking for a boolean
+            // because this is a DELETE Call, we are just looking for a boolean
             if ($response) {
                 $holdResult->status = true;
             } else {
@@ -559,7 +558,6 @@ class OverdriveConnector implements LoggerAwareInterface,
     public function returnResource($resourceID)
     {
         $result = $this->getResultObject();
-        //$this->debug(print_r($user,true));
         if (!$user = $this->getUser()) {
             $this->error("user is not logged in", false, true);
             return $result;
@@ -571,7 +569,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                 $user["cat_password"], $url, null, "DELETE"
             );
 
-            //because this is a DELETE Call, we are just looking for a boolean
+            // because this is a DELETE Call, we are just looking for a boolean
             if ($response) {
                 $result->status = true;
             } else {
@@ -596,23 +594,22 @@ class OverdriveConnector implements LoggerAwareInterface,
         $this->debug("getDownloadLink: id: $overDriveId, $format");
         $result = $this->getResultObject();
         $downloadLink = false;
-        //$this->debug(print_r($user,true));
         if (!$user = $this->getUser()) {
             $this->error("user is not logged in", false, true);
             return $result;
         }
         $checkout = $this->getCheckout($overDriveId, false);
 
-        //either they are requesting a format that is always avail
-        //or it is locked in and they are requesting the format that
-        //is already locked in.
+        // either they are requesting a format that is always avail
+        // or it is locked in and they are requesting the format that
+        // is already locked in.
         if ($template = $this->getLinkTemplate($checkout, $format)) {
             $this->debug("template: " . print_r($template, true));
             $downloadLink = $template->downloadLinkV2->href;
             $this->debug("found the link: $downloadLink");
         } elseif (!$checkout->isFormatLockedIn) {
-            //if we get this far, and the checkout is not locked in, then we should
-            //lock it in and try again
+            // if we get this far, and the checkout is not locked in, then we should
+            // lock it in and try again
 
             $lockinResult = $this->lockinResource($overDriveId, $format);
             if ($lockinResult->status) {
@@ -623,9 +620,9 @@ class OverdriveConnector implements LoggerAwareInterface,
                 $result->msg = $lockinResult->msg;
             }
         } else {
-            //the checkout is locked in but we didn't find the template
-            //for this format, means that they are requesting the wrong
-            //format for the locked-in resource.
+            // the checkout is locked in but we didn't find the template
+            // for this format, means that they are requesting the wrong
+            // format for the locked-in resource.
             $result->msg
                 = "The title appears to be already locked in for a different format";
             $result->status = false;
@@ -699,7 +696,7 @@ class OverdriveConnector implements LoggerAwareInterface,
             $this->error("user is not logged in", false, true);
             return $result;
         }
-        //shouldn't need to refresh.  This should be in the cache if it exists
+        // shouldn't need to refresh.  This should be in the cache if it exists
         $checkout = $this->getCheckout($overDriveId, false);
         if (!$checkout) {
             $result->msg
@@ -708,9 +705,8 @@ class OverdriveConnector implements LoggerAwareInterface,
             $this->debug("title not checked out.");
             return $result;
         }
-        //doublecheck this format is an option.
+        // doublecheck this format is an option.
         $availableFormats = [];
-        //$params = array();
         foreach ($checkout->actions->format->fields as $field) {
             if ($field->name == 'formatType') {
                 $availableFormats = $field->options;
@@ -933,9 +929,8 @@ class OverdriveConnector implements LoggerAwareInterface,
      */
     public function getCheckouts($refresh = true)
     {
-        //the checkouts are cached in the session, but we can force a refresh
+        // the checkouts are cached in the session, but we can force a refresh
         $this->debug("get Overdrive Checkouts");
-        // $this->debug(print_r($user,true));
         $result = $this->getResultObject();
 
         if (!$user = $this->getUser()) {
@@ -956,7 +951,7 @@ class OverdriveConnector implements LoggerAwareInterface,
                     $result->status = true;
                     $result->message = '';
                     $result->data = $response->checkouts;
-                    //Convert dates to desired format
+                    // Convert dates to desired format
                     foreach ($response->checkouts as $key => $checkout) {
                         $coExpires = new \DateTime($checkout->expires);
                         $result->data[$key]->expires = $coExpires->format(
@@ -971,7 +966,6 @@ class OverdriveConnector implements LoggerAwareInterface,
                 } else {
                     $accessResult = $this->getAccess();
                     return $accessResult;
-                    //$result->code = 'od_code_connection_failed';
                 }
             }
         } else {
@@ -1017,13 +1011,13 @@ class OverdriveConnector implements LoggerAwareInterface,
                     $result->status = true;
                     $result->message = 'hold_place_success_html';
                     $result->data = $response->holds;
-                    //Check for holds ready for chechout
+                    // Check for holds ready for chechout
                     foreach ($response->holds as $key => $hold) {
                         if (!$hold->autoCheckout
                             && $hold->holdListPosition == 1
                         ) {
                             $result->data[$key]->holdReadyForCheckout = true;
-                            //format the expires date.
+                            // format the expires date.
                             $holdExpires = new \DateTime($hold->holdExpires);
                             $result->data[$key]->holdExpires
                                 = $holdExpires->format(
@@ -1088,7 +1082,7 @@ class OverdriveConnector implements LoggerAwareInterface,
             $client->setMethod($requestType);
             $client->setUri($url);
             try {
-                //throw new Exception('testException');
+                // throw new Exception('testException');
                 $response = $client->send();
             } catch (Exception $ex) {
                 $this->error(
@@ -1115,7 +1109,7 @@ class OverdriveConnector implements LoggerAwareInterface,
             );
             if ($returnVal != null) {
                 if (isset($returnVal->errorCode)) {
-                    //In some cases, this should be returned perhaps...
+                    // In some cases, this should be returned perhaps...
                     $this->error("Overdrive Error: " . $returnVal->errorCode);
                     return $returnVal;
                 } else {
@@ -1190,7 +1184,7 @@ class OverdriveConnector implements LoggerAwareInterface,
             );
             if ($tokenData != null) {
                 if (isset($tokenData->errorCode)) {
-                    //In some cases, this should be returned perhaps...
+                    // In some cases, this should be returned perhaps...
                     $this->error("Overdrive Error: " . $tokenData->errorCode);
                     return false;
                 } else {
@@ -1276,8 +1270,8 @@ class OverdriveConnector implements LoggerAwareInterface,
             }
             $body = $response->getBody();
 
-            //if all goes well for DELETE, the code will be 204
-            //and response is empty.
+            // if all goes well for DELETE, the code will be 204
+            // and response is empty.
             if ($requestType == "DELETE") {
                 if ($response->getStatusCode() == 204) {
                     $this->debug("DELETE Patron call appears to have worked.");
@@ -1386,10 +1380,10 @@ class OverdriveConnector implements LoggerAwareInterface,
                         $patronTokenData, true
                     )
                 );
-                //if we have an unauthorized error, then we are going
-                //to cache that in the session so we don't keep making
-                //unnecessary calls, otherwise, just don't store the tokenData
-                //object so that it gets checked again next time
+                // if we have an unauthorized error, then we are going
+                // to cache that in the session so we don't keep making
+                // unnecessary calls, otherwise, just don't store the tokenData
+                // object so that it gets checked again next time
                 if ($patronTokenData->error == 'unauthorized_client') {
                     $this->getSessionContainer()->odAccessMessage
                         = $patronTokenData->error_description;
@@ -1423,7 +1417,7 @@ class OverdriveConnector implements LoggerAwareInterface,
         }
         if (!$this->client) {
             $this->client = $this->httpService->createClient($url);
-            //set keep alive to true since we are sending to the same server
+            // set keep alive to true since we are sending to the same server
             $this->client->setOptions(['keepalive', true]);
         }
         $this->client->resetParameters();