chore: revert formatting change in spanner (#13295)

In #13236, a
formatting change caused a diff between what is generated by librarian
and what actually exists. This blocks
#13284, because
there is a diff. This PR fixes the formatting issue. Then once we merge
that presubmit check, we can make sure these changes don't occur ad hoc.

Author: sofisl

java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/connection/ConnectionProperties.java

@@ -271,7 +271,8 @@ public class ConnectionProperties {
   static final ConnectionProperty<SpannerOptions.InstanceType> TYPE =
       create(
           TYPE_PROPERTY_NAME,
-          "Specifies the type of Spanner instance to connect to (cloud or omni). Setting it to omni is mandatory when connecting to a Spanner Omni instance.",
+          "Specifies the type of Spanner instance to connect to (cloud or omni). Setting it to omni"
+              + " is mandatory when connecting to a Spanner Omni instance.",
           DEFAULT_TYPE,
           new SpannerOptions.InstanceType[] {
             SpannerOptions.InstanceType.CLOUD, SpannerOptions.InstanceType.OMNI,