small flake8 fixes (#5058)

cylc/flow/network/__init__.py

@@ -179,13 +179,13 @@ def _socket_bind(self, min_port, max_port, srv_prv_key_loc=None):
         try:
             server_public_key, server_private_key = zmq.auth.load_certificate(
                 srv_prv_key_info.full_key_path)
-        except (ValueError):
+        except ValueError:
             raise ServiceFileError(
                 f"Failed to find server's public "
                 f"key in "
                 f"{srv_prv_key_info.full_key_path}."
             )
-        except(OSError):
+        except OSError:
             raise ServiceFileError(
                 f"IO error opening server's private "
                 f"key from "

cylc/flow/parsec/fileparse.py

@@ -292,7 +292,7 @@ def process_plugins(fpath, opts):
                 f"{extra_vars['templating_detected']} and "
                 f"{plugin_result['templating_detected']}"
             )
-        elif(
+        elif (
             'templating_detected' in plugin_result and
             plugin_result['templating_detected'] is not None
         ):

cylc/flow/tui/app.py

@@ -316,7 +316,7 @@ def get_snapshot(self):
             # Distinguish stopped flow from non-existent flow.
             self.client = None
             full_path = Path(get_workflow_run_dir(self.reg))
-            if(
+            if (
                 (full_path / WorkflowFiles.SUITE_RC).is_file()
                 or (full_path / WorkflowFiles.FLOW_FILE).is_file()
             ):

cylc/flow/workflow_files.py

@@ -284,7 +284,8 @@ class ContactFileFields:
     """The process ID of the running workflow on ``CYLC_WORKFLOW_HOST``."""
 
     COMMAND = 'CYLC_WORKFLOW_COMMAND'
-    """The command that was used to run the workflow on ``CYLC_WORKFLOW_HOST```.
+    """The command that was used to run the workflow on
+    ``CYLC_WORKFLOW_HOST```.
 
     Note that this command may be affected by:
 

cylc/flow/xtriggers/echo.py

@@ -20,7 +20,8 @@
 
 
 def echo(*args, **kwargs):
-    """Prints args to stdout and return success only if kwargs['succeed'] is True.
+    """Prints args to stdout and return success only if kwargs['succeed']
+    is True.
 
     This may be a useful aid to understanding how xtriggers work.