Fix pylint issues

varats/varats/tools/research_tools/development.py

@@ -5,7 +5,6 @@
 import re
 import typing as tp
 from collections import defaultdict
-from pathlib import Path
 
 from varats.tools.research_tools.research_tool import CodeBase, SubProject
 from varats.utils.settings import vara_cfg
@@ -35,18 +34,19 @@ def __quickfix_dev_branches(branch_name: str, sub_project: SubProject) -> str:
 
     Test:
     >>> import re
-    >>> fixed_branch_name = __quickfix_dev_branches(\
-        'vara-dev', SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
+    >>> from pathlib import Path
+    >>> fixed_branch_name = __quickfix_dev_branches('vara-dev', \
+        SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
     >>> re.match(r'vara-\\d+-dev', fixed_branch_name) is not None
     True
 
-    >>> fixed_branch_name = __quickfix_dev_branches(\
-        'vara', SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
+    >>> fixed_branch_name = __quickfix_dev_branches('vara', \
+        SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
     >>> re.match(r'vara-\\d+', fixed_branch_name) is not None
     True
 
-    >>> __quickfix_dev_branches(\
-        "f-FooBar", SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
+    >>> __quickfix_dev_branches("f-FooBar", \
+        SubProject(Path("/dev/null"), "vara-llvm-project", "", "", ""))
     'f-FooBar'
 
     >>> __quickfix_dev_branches(\