Fix some typos in documentation

Change-Id: I67d82228bb37b8b4634c07e76a421964e227c3cb
Signed-off-by: Mattia Rizzolo <mattia@mapreri.org>

doc/source/definition.rst

@@ -577,7 +577,7 @@ and replace them with the empty string instead.
 
    Refer to :ref:`default-values` for details on setting variable defaults.
 
-Variable Inheritence
+Variable Inheritance
 ^^^^^^^^^^^^^^^^^^^^
 
 It is possible in JJB to define defaults for variables at different levels such
@@ -624,7 +624,7 @@ When a project wants to use a job-template it can use override it as follows:
 This is the standard way that most folks use and it will set ``branch: master``
 for every job-template in the list. However sometimes we may want to provide an
 alternative value for a specific job in the list. In this case the more
-specific declaration takes precendence:
+specific declaration takes precedence:
 
 .. code-block:: yaml
 

jenkins_jobs/modules/publishers.py

@@ -7451,7 +7451,7 @@ def slack(registry, xml_parent, data):
         (>=2.0). (default false)
     :arg bool notify-failure: Send notification when job fails for the first
         time (previous build was a success) (>=2.0).  (default false)
-    :arg bool notify-every-failure: Send notification everytime a job fails
+    :arg bool notify-every-failure: Send notification every time a job fails
         (>=2.23). (default false)
     :arg bool notify-back-to-normal: Send notification when job is succeeding
         again after being unstable or failed (>=2.0). (default false)

jenkins_jobs/modules/wrappers.py

@@ -1590,7 +1590,7 @@ def sauce_ondemand(registry, xml_parent, data):
         to your private network (default false)
     :arg str sauce-host: The name of the selenium host to be used.  For
         tests run using Sauce Connect, this should be localhost.
-        ondemand.saucelabs.com can also be used to conenct directly to
+        ondemand.saucelabs.com can also be used to connect directly to
         Sauce OnDemand,  The value of the host will be stored in the
         SAUCE_ONDEMAND_HOST environment variable.  (default '')
     :arg str sauce-port: The name of the Selenium Port to be used.  For