Touch up grammar in warning messages

Change-Id: I556e6e646417be3732a7c31987ec964f9808f079

doc/source/transport.rst

@@ -16,15 +16,15 @@ Transport
 .. autofunction:: set_transport_defaults
 
 
-About fork oslo.messaging transport object
-------------------------------------------
+Forking Processes and oslo.messaging Transport objects
+------------------------------------------------------
 
 oslo.messaging can't ensure that forking a process that shares the same
 transport object is safe for the library consumer, because it relies on
-different 3rd party libraries that don't ensure that too, but in certain
-case/driver it works:
+different 3rd party libraries that don't ensure that. In certain
+cases, with some drivers, it does work:
 
 * rabbit: works only if no connection have already been established.
-* qpid: doesn't work (qpid library have a global state that use fd
-  that can't be resetted)
+* qpid: doesn't work (The qpid library has a global state that uses
+  file descriptors that can't be reset)
 * amqp1: works

oslo/messaging/_drivers/impl_qpid.py

@@ -590,7 +590,7 @@ class Connection(object):
             # https://github.com/celery/kombu/blob/master/kombu/transport/
             # qpid_patches.py#L67
             LOG.warn("Process forked! "
-                     "This can results to unpredictable behavior. "
+                     "This can result in unpredictable behavior. "
                      "See: http://docs.openstack.org/developer/"
                      "oslo.messaging/transport.html")
             self._initial_pid = current_pid

oslo/messaging/_drivers/impl_rabbit.py

@@ -559,7 +559,7 @@ class Connection(object):
         current_pid = os.getpid()
         if self._initial_pid != current_pid:
             LOG.warn("Process forked after connection established! "
-                     "This can results to unpredictable behavior. "
+                     "This can result in unpredictable behavior. "
                      "See: http://docs.openstack.org/developer/"
                      "oslo.messaging/transport.html")
             self._initial_pid = current_pid