[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

docs/source/reference/db.md

@@ -80,7 +80,7 @@ TaskRecord keys:
 MongoDB operators we emulate on all backends:
 
 | Operator | Python equivalent                                                             |
-| -------- |-------------------------------------------------------------------------------|
+| -------- | ----------------------------------------------------------------------------- |
 | '\$in'   | in                                                                            |
 | '\$nin'  | not in                                                                        |
 | '\$eq'   | ==                                                                            |
@@ -89,12 +89,12 @@ MongoDB operators we emulate on all backends:
 | '\$gte'  | >=                                                                            |
 | '\$le'   | \<                                                                            |
 | '\$lte'  | \<=                                                                           |
-| '\$glob' | [fnmatch](https://docs.python.org/3/library/fnmatch.html) (wildcard matching) | 
+| '\$glob' | [fnmatch](https://docs.python.org/3/library/fnmatch.html) (wildcard matching) |
 
-Remarks on _$glob_: The operator can be used to find substrings in DB columns based on 
-[unix style filename pattern matching](https://docs.python.org/3/library/fnmatch.html) 
-_$glob_ is **not** a regular MongoDB opertor, but is internally translated to a regular 
-expression (_$regex_) which is natively supported by MongoDB.  
+Remarks on _$glob_: The operator can be used to find substrings in DB columns based on
+[unix style filename pattern matching](https://docs.python.org/3/library/fnmatch.html)
+_$glob_ is **not** a regular MongoDB opertor, but is internally translated to a regular
+expression (_$regex_) which is natively supported by MongoDB.
 
 The DB Query is useful for two primary cases:
 

ipyparallel/controller/dictdb.py

@@ -37,7 +37,6 @@
 # Distributed under the terms of the Modified BSD License.
 import copy
 import fnmatch
-import re
 from copy import deepcopy
 from datetime import datetime
 

ipyparallel/controller/mongodb.py

@@ -127,7 +127,7 @@ def _translate(self, filter):
                     )
                 # we need to attach the start and end match character to achieve
                 # an equivalent matching behavior to fnmatch in mongoDB
-                ret["$regex"] = "^"+fnmatch.translate(glob)+"$"
+                ret["$regex"] = "^" + fnmatch.translate(glob) + "$"
             else:
                 for key, value in filter.items():
                     if isinstance(value, dict):