Fixes typo signalled -> signaled

celery/app/task.py

@@ -223,7 +223,7 @@ class Task(object):
 
     #: Even if :attr:`acks_late` is enabled, the worker will
     #: acknowledge tasks when the worker process executing them abrubtly
-    #: exits or is signalled (e.g. :sig:`KILL`/:sig:`INT`, etc).
+    #: exits or is signaled (e.g. :sig:`KILL`/:sig:`INT`, etc).
     #:
     #: Setting this to true allows the message to be requeued instead,
     #: so that the task will execute again by the same worker, or another

docs/configuration.rst

@@ -447,7 +447,7 @@ task_reject_on_worker_lost
 
 Even if :setting:`task_acks_late` is enabled, the worker will
 acknowledge tasks when the worker process executing them abrubtly
-exits or is signalled (e.g. :sig:`KILL`/:sig:`INT`, etc).
+exits or is signaled (e.g. :sig:`KILL`/:sig:`INT`, etc).
 
 Setting this to true allows the message to be requeued instead,
 so that the task will execute again by the same worker, or another

docs/whatsnew-3.0.rst

@@ -709,7 +709,7 @@ In Other News
 
 - New :setting:`CELERYD_WORKER_LOST_WAIT` to control the timeout in
   seconds before :exc:`billiard.WorkerLostError` is raised
-  when a worker can not be signalled (Issue #595).
+  when a worker can not be signaled (Issue #595).
 
     Contributed by Brendon Crawford.