Improve formatting of scripts and test files

Summary: Reformatted the scripts and test files to look better and also to avoid lint warnings in the future

Reviewed By: andriigrynenko

Differential Revision: D5673856

fbshipit-source-id: 5818625ec14d18ef3b9b804df53949afefc3b98f

folly/fibers/scripts/gdb.py

@@ -77,7 +77,8 @@ class GetFiberXMethodWorker(gdb.xmethod.XMethodWorker):
 
 class GetFiberXMethodMatcher(gdb.xmethod.XMethodMatcher):
     def __init__(self):
-        super(GetFiberXMethodMatcher, self).__init__("Fiber address method matcher")
+        super(GetFiberXMethodMatcher, self).__init__(
+            "Fiber address method matcher")
         self.worker = GetFiberXMethodWorker()
 
     def match(self, class_type, method_name):