trivial: separate paragraph to highlight valid range for cacheSizeGB

Author: kay-kim

source/reference/configuration-options.txt

@@ -3578,13 +3578,13 @@ LDAP Parameters
 
    *Type*: float
 
-   
    Defines the maximum size of the internal cache that WiredTiger will
    use for all data. The memory consumed by an index build (see
    :parameter:`maxIndexBuildMemoryUsageMegabytes`) is separate from the
-   WiredTiger cache memory. Starting in MongoDB 3.4, the values can range
-   from 0.25 GB  to 10000 GB and can be a float.
-   
+   WiredTiger cache memory. 
+
+   Values can range from ``0.25`` GB to ``10000`` GB.
+
    .. include:: /includes/extracts/wt-cache-default-setting.rst
 
    Avoid increasing the WiredTiger internal cache size above its

source/reference/program/mongod.txt

@@ -1598,9 +1598,10 @@ WiredTiger Options
    Defines the maximum size of the internal cache that WiredTiger will
    use for all data. The memory consumed by an index build (see
    :parameter:`maxIndexBuildMemoryUsageMegabytes`) is separate from the
-   WiredTiger cache memory. Starting in MongoDB 3.4, the values can range
-   from 0.25 GB  to 10000 GB and can be a float.
-   
+   WiredTiger cache memory. 
+
+   Values can range from ``0.25`` GB to ``10000`` GB.
+
    .. include:: /includes/extracts/wt-cache-default-setting.rst
 
    Avoid increasing the WiredTiger internal cache size above its