cephfs-shell: Fix flake8 errors (E302, E502, E128, F821, W605, 5128, E122)

src/tools/cephfs/cephfs-shell

@@ -64,6 +64,7 @@ shell = None    # holds instance of class CephFSShell
 #
 #######################################################################
 
+
 def poutput(s, end='\n'):
     shell.poutput(s, end=end)
 
@@ -111,13 +112,14 @@ def to_bytes(param):
     elif isinstance(param, str):
         return bytes(param, encoding='utf-8')
     elif isinstance(param, list):
-        return [i.encode('utf-8') if isinstance(i, str) else to_bytes(i) for \
+        return [i.encode('utf-8') if isinstance(i, str) else to_bytes(i) for
                 i in param]
     elif isinstance(param, int) or isinstance(param, float):
         return str(param).encode('utf-8')
     elif param is None:
         return None
 
+
 def ls(path, opts=''):
     # opts tries to be like /bin/ls opts
     almost_all = 'A' in opts
@@ -134,6 +136,7 @@ def ls(path, opts=''):
         perror(e)
         shell.exit_code = e.get_error_code()
 
+
 def glob(path, pattern):
     paths = []
     parent_dir = os.path.dirname(path)
@@ -1220,7 +1223,7 @@ class CephFSShell(Cmd):
                     if f[0] is ord('/'):
                         f = b'.' + f
                     poutput('{:10s} {}'.format(humansize(dusage),
-                        f.decode('utf-8')))
+                            f.decode('utf-8')))
                 except libcephfs.Error as e:
                     perror(e)
                     self.exit_code = e.get_error_code()
@@ -1354,7 +1357,6 @@ class CephFSShell(Cmd):
         else:
             self.perror("snapshot can only be created or deleted; check - "
                         "help snap")
-            self.exit_code = e.get_error_code()
 
     def do_help(self, line):
         """