[Telemetry] Style fix, make docstrings consistent with style guide.

tools/telemetry/telemetry/timeline/event.py

Index: tools/telemetry/telemetry/timeline/event.py
diff --git a/tools/telemetry/telemetry/timeline/event.py b/tools/telemetry/telemetry/timeline/event.py
index 293e7754258eeed1061a65a9eab71d3448b745b3..996cba9b8908e261c26efb9dc3f5c90374da8041 100644
--- a/tools/telemetry/telemetry/timeline/event.py
+++ b/tools/telemetry/telemetry/timeline/event.py
@@ -5,12 +5,12 @@
 class TimelineEvent(object):
   """Represents a timeline event.
 
-     thread_start, thread_duration and thread_end are the start time, duration
-     and end time of this event as measured by the thread-specific CPU clock
-     (ticking when the thread is actually scheduled). Thread time is optional
-     on trace events and the corresponding attributes in TimelineEvent will be
-     set to None (not 0) if not present. Users of this class need to properly
-     handle this case.
+  thread_start, thread_duration and thread_end are the start time, duration
+  and end time of this event as measured by the thread-specific CPU clock
+  (ticking when the thread is actually scheduled). Thread time is optional
+  on trace events and the corresponding attributes in TimelineEvent will be
+  set to None (not 0) if not present. Users of this class need to properly
+  handle this case.
   """
   def __init__(self, category, name, start, duration, thread_start=None,
                thread_duration=None, args=None):
@@ -34,7 +34,7 @@ class TimelineEvent(object):
   def thread_end(self):
     """Thread-specific CPU time when this event ended.
 
-       May be None if the trace event didn't have thread time data.
+    May be None if the trace event didn't have thread time data.
     """
     if self.thread_start == None or self.thread_duration == None:
       return None