diff --git a/src/core/wopi.py b/src/core/wopi.py
index f826902a..2c3cebb3 100644
--- a/src/core/wopi.py
+++ b/src/core/wopi.py
@@ -261,8 +261,8 @@ def setLock(fileid, reqheaders, acctok):
                 retrievedLock, lockHolder = utils.retrieveWopiLock(fileid, op, lock, acctok)
             # validate against either the given lock (RefreshLock case) or the given old lock (UnlockAndRelock case)
             if retrievedLock and not utils.compareWopiLocks(retrievedLock, (oldLock if oldLock else lock)):
-                # lock mismatch, the WOPI client is supposed to acknowledge the existing lock
-                # and deny access to the file in edit mode otherwise
+                # lock mismatch, the WOPI client is supposed to acknowledge the existing lock to start a collab session,
+                # or deny access to the file in edit mode otherwise
                 return utils.makeConflictResponse(op, acctok['userid'], retrievedLock, lock, oldLock, acctok['endpoint'], fn,
                                                   'The file is locked by %s' %
                                                   (lockHolder if lockHolder != 'wopi' else 'another online editor'))   # TODO cleanup 'wopi' case
diff --git a/src/core/wopiutils.py b/src/core/wopiutils.py
index cd19fc32..9b9f774f 100644
--- a/src/core/wopiutils.py
+++ b/src/core/wopiutils.py
@@ -143,7 +143,7 @@ def validateAndLogHeaders(op):
 
     # update bookkeeping of pending sessions
     if op.title() == 'Checkfileinfo' and session in srv.conflictsessions['pending'] and \
-        time.mktime(time.strptime(srv.conflictsessions['pending'][session]['time'])) < time.time() - 300:
+       time.mktime(time.strptime(srv.conflictsessions['pending'][session]['time'])) < time.time() - 300:
         # a previously conflicted session is still around executing Checkfileinfo after 5 minutes, assume it got resolved
         _resolveSession(session, acctok['filename'])
     return acctok, None
diff --git a/src/core/xrootiface.py b/src/core/xrootiface.py
index 3e790e18..3e50f822 100644
--- a/src/core/xrootiface.py
+++ b/src/core/xrootiface.py
@@ -200,10 +200,11 @@ def statx(endpoint, fileref, userid, versioninv=1):
                          + '&mgm.pcmd=fileinfo&mgm.file.info.option=-m')
     try:
         # output looks like:
-        # keylength.file=35 file=/eos/.../filename size=2915 mtime=1599649863.0 ctime=1599649866.280468540 btime=1599649866.280468540 clock=0 mode=0644
-        # uid=4179 gid=2763 fxid=19ab8b68 fid=430672744 ino=115607834422411264 pid=1713958 pxid=001a2726 xstype=adler xs=a2dfcdf9
-        # etag="115607834422411264:a2dfcdf9" detached=0 layout=replica nstripes=2 lid=00100112 nrep=2 xattrn=sys.eos.btime xattrv=1599649866.280468540
-        # uid:xxxx[username] gid:xxxx[group] tident:xxx name:username dn: prot:https host:xxxx.cern.ch domain:cern.ch geo: sudo:0 fsid=305 fsid=486
+        # keylength.file=35 file=/eos/.../filename size=2915 mtime=1599649863.0 ctime=1599649866.280468540
+        # btime=1599649866.280468540 clock=0 mode=0644 uid=xxxx gid=xxxx fxid=19ab8b68 fid=430672744 ino=115607834422411264
+        # pid=1713958 pxid=001a2726 xstype=adler xs=a2dfcdf9 etag="115607834422411264:a2dfcdf9" detached=0 layout=replica
+        # nstripes=2 lid=00100112 nrep=2 xattrn=sys.eos.btime xattrv=1599649866.280468540 uid:xxxx[username] gid:xxxx[group]
+        # tident:xxx name:username dn: prot:https host:xxxx.cern.ch domain:cern.ch geo: sudo:0 fsid=305 fsid=486
         # cf. https://gitlab.cern.ch/dss/eos/-/blob/master/archive/eosarch/utils.py
         kvlist = [kv.split('=') for kv in statInfo.split()]
         statxdata = {k: v.strip('"') for k, v in [kv for kv in kvlist if len(kv) == 2]}
diff --git a/src/wopiserver.py b/src/wopiserver.py
index 6367025e..6a32844e 100755
--- a/src/wopiserver.py
+++ b/src/wopiserver.py
@@ -77,7 +77,6 @@ class Wopi:
     # sets of sessions for which a lock conflict is outstanding or resolved
     conflictsessions = {'pending': {}, 'resolved': {}}
 
-
     @classmethod
     def init(cls):
         '''Initialises the application, bails out in case of failures. Note this is not a __init__ method'''
@@ -344,8 +343,8 @@ def iopOpenInApp():
     if bridge.issupported(appname):
         try:
             res['app-url'], res['form-parameters'] = bridge.appopen(utils.generateWopiSrc(inode), acctok,
-                    (appname, appurl, url_unquote_plus(req.args.get('appinturl', appurl)), req.headers.get('ApiKey')),
-                    viewmode, usertoken)
+                (appname, appurl, url_unquote_plus(req.args.get('appinturl', appurl)), req.headers.get('ApiKey')),  # noqa: E128
+                 viewmode, usertoken)
         except bridge.FailedOpen as foe:
             return foe.msg, foe.statuscode
     else: