DOCSP-31018 BACKPORT (#3480)

Author: Dave Cuthbert

source/includes/arbiter-fcv.rst

@@ -1,5 +1,5 @@
 
 Arbiters do not replicate the :data:`admin.system.version` collection.
-Because of this, arbiters always have a Feature Compatibility Version equal
+Because of this, arbiters always have a feature compatibility version equal
 to the downgrade version of the binary, regardless of the fCV value of the
 replica set.

source/release-notes/3.4-downgrade-replica-set.txt

@@ -32,7 +32,7 @@ compatibility version and remove any :ref:`3.4 features incompatible
 outlined below. These steps are necessary only if
 ``featureCompatibilityVersion`` has ever been set  to ``"3.4"``.
 
-.. |fcv| replace:: :ref:`Feature Compatibility Version to "3.2"
+.. |fcv| replace:: :ref:`feature compatibility version to "3.2"
    <3.4-downgrade-feature-compatibility-rs>`
 
 .. |target| replace:: primary

source/release-notes/3.4-downgrade-sharded-cluster.txt

@@ -32,7 +32,7 @@ compatibility version and remove any :ref:`3.4 features incompatible
 below. These steps are necessary only if
 ``featureCompatibilityVersion`` has ever been set to ``"3.4"``.
 
-.. |fcv| replace:: :ref:`Feature Compatibility Version to "3.2" <3.4-downgrade-feature-compatibility-sharded-cluster>`
+.. |fcv| replace:: :ref:`feature compatibility version to "3.2" <3.4-downgrade-feature-compatibility-sharded-cluster>`
 
 .. |target| replace:: :binary:`~bin.mongos` instance
 

source/release-notes/3.4-downgrade.txt

@@ -51,7 +51,7 @@ or sharded cluster, see:
 
 .. |target| replace:: target
 
-.. |fcv| replace:: :ref:`Feature Compatibility Version to "3.2" <3.4-downgrade-feature-compatibility>`
+.. |fcv| replace:: :ref:`feature compatibility version to "3.2" <3.4-downgrade-feature-compatibility>`
 
 2. Remove Views
 ~~~~~~~~~~~~~~~