Fix some docstring typos.

buildbot/scheduler.py

@@ -19,7 +19,7 @@
 
 class BaseScheduler(service.MultiService, util.ComparableMixin):
     """
-    A Schduler creates BuildSets and submits them to the BuildMaster.
+    A Scheduler creates BuildSets and submits them to the BuildMaster.
 
     @ivar name: name of the scheduler
 
@@ -81,7 +81,7 @@ def buildSetFinished(self, bss):
 class Scheduler(BaseUpstreamScheduler):
     """The default Scheduler class will run a build after some period of time
     called the C{treeStableTimer}, on a given set of Builders. It only pays
-    attention to a single branch. You you can provide a C{fileIsImportant}
+    attention to a single branch. You can provide a C{fileIsImportant}
     function which will evaluate each Change to decide whether or not it
     should trigger a new build.
     """
@@ -95,11 +95,11 @@ def __init__(self, name, branch, treeStableTimer, builderNames,
         """
         @param name: the name of this Scheduler
         @param branch: The branch name that the Scheduler should pay
-                       attention to. Any Change that is not on this branch
+                       attention to. Any Change that is not in this branch
                        will be ignored. It can be set to None to only pay
                        attention to the default branch.
         @param treeStableTimer: the duration, in seconds, for which the tree
-                                must remain unchanged before a build will be
+                                must remain unchanged before a build is
                                 triggered. This is intended to avoid builds
                                 of partially-committed fixes.
         @param builderNames: a list of Builder names. When this Scheduler
@@ -222,14 +222,14 @@ def __init__(self, name, branches, treeStableTimer, builderNames,
         """
         @param name: the name of this Scheduler
         @param branches: The branch names that the Scheduler should pay
-                         attention to. Any Change that is not on one of these
+                         attention to. Any Change that is not in one of these
                          branches will be ignored. It can be set to None to
                          accept changes from any branch. Don't use [] (an
                          empty list), because that means we don't pay
                          attention to *any* branches, so we'll never build
                          anything.
         @param treeStableTimer: the duration, in seconds, for which the tree
-                                must remain unchanged before a build will be
+                                must remain unchanged before a build is
                                 triggered. This is intended to avoid builds
                                 of partially-committed fixes.
         @param builderNames: a list of Builder names. When this Scheduler