Typo and rst formatting fixes

Author: Ed Costello

source/administration/master-slave.txt

@@ -411,9 +411,10 @@ slave's :data:`local.sources` collection.
       db.sources.update( { host : "prod.mississippi" }, { $set : { host : "prod.mississippi.example.net" } } )
 
    Restart the slave with the correct command line arguments or with no
-   ``--source`` argument. After configuring :data:`local.sources` the
+   :option:`--source <mongod --source>` option.
+   After configuring :data:`local.sources` the
    first time, the :option:`--source <mongod --source>` will have no
-   subsequent affect. Therefore, both of the following invocations are
+   subsequent effect. Therefore, both of the following invocations are
    correct:
 
    .. code-block:: javascript

source/includes/note-rs-conf-array-index.rst

@@ -3,8 +3,8 @@
    When updating the replica configuration object, address all members
    of the set using the index value in the array. The array index
    begins with ``0``. Do not confuse this index value with the value
-   of the :data:`_id <members[n]._id` field in each document in the
+   of the :data:`_id <members[n]._id>` field in each document in the
    :data:`members <rs.conf.members>` array.
 
-   The :data:`_id <members[n]._id` rarely corresponds to the array
+   The :data:`_id <members[n]._id>` rarely corresponds to the array
    index.

source/reference/command/copydb.txt

@@ -23,7 +23,7 @@ copydb
 
    All of the following arguments are optional:
 
-   - slaveOK
+   - slaveOk
    - username
    - password
    - nonce

source/reference/commands.txt

@@ -35,7 +35,7 @@ commands called :method:`db.runCommand()`. The following operation in
 
 Many :doc:`drivers </applications/drivers>` provide an equivalent for
 the :method:`db.runCommand()` method. Internally, running commands
-with :method:`db.runCommand()` is equivelent to a special query
+with :method:`db.runCommand()` is equivalent to a special query
 against the :term:`$cmd` collection.
 
 Many common commands have their own shell helpers or wrappers in the
@@ -72,7 +72,7 @@ Failed commands return the ``ok`` field with a value of ``0``.
 All of the following command descriptions, provide a document template
 or prototype for each command. Some command documentation also
 includes the relevant :program:`mongo` shell helpers. See
-:doc:`/reference/command` for a list of all comamnds.
+:doc:`/reference/command` for a list of all commands.
 
 User Commands
 -------------