Improves flow.

Existing Wording:

Note that the name of the valueset uses double quotes, in contrast to the string representation of the OID for the valueset, which uses single quotes. Single quotes are used to build arbitrary strings in CQL; double quotes are used to represent names of constructs such as valuesets and expression definitions.

Proposed Wording:

Note that the name of the valueset uses double quotes, unlike the string representation of the OID for the valueset, which uses single quotes. Single quotes are used to build arbitrary strings in CQL; double quotes are used to represent names of constructs such as valuesets and expression definitions.