update handwritten dox files

Author: scotthart

google/cloud/bigtable/doc/bigtable-main.dox

@@ -115,8 +115,8 @@ guide for more details.
 @page bigtable-universe-domain-example Override the default Universe Domain
 
 In some cases, you may need to override the default universe domain used by the
-client library. Use the `google::cloud::AddUniverseDomainOption` when
-initializing the client library to change this default.
+client library. Use `AddUniverseDomainOption` when initializing the client
+library to change this default.
 
 @snippet client_samples.cc table-set-universe-domain
 

google/cloud/compute/doc/override-universe-domain.dox

@@ -1,10 +1,9 @@
 /*!
 @page compute-override-universe-domain How to Override the Default Universe Domain
 
-In some cases, you may need to override the default universe domain used by the client
-library. Use the
-[AddUniverseDomainOption](@ref google::cloud::AddUniverseDomainOption) when initializing the
-client library to change this default.
+In some cases, you may need to override the default universe domain used by the
+client library. Use `AddUniverseDomainOption` when initializing the client
+library to change this default.
 
 <!-- inject-universe-domain-snippet-start -->
 For example, this will override the default universe domain for `compute_accelerator_types_v1::AcceleratorTypesClient`:

google/cloud/pubsub/doc/pubsub-main.dox

@@ -113,8 +113,8 @@ Follow these links to find examples for other `*Client` classes:
 @page pubsub-universe-domain-example Override the default universe domain
 
 In some cases, you may need to override the default universe domain used by the
-client library. Use the `google::cloud::AddUniverseDomainOption` when
-initializing the client library to change this default.
+client library. Use `AddUniverseDomainOption` when initializing the client
+library to change this default.
 
 @snippet client_samples.cc publisher-set-universe-domain
 

google/cloud/spanner/doc/spanner-main.dox

@@ -90,8 +90,8 @@ Follow these links to find examples for other `*Client` classes:
 @page spanner-universe-domain-example Override the default universe domain
 
 In some cases, you may need to override the default universe domain used by the
-client library. Use the `google::cloud::AddUniverseDomainOption` when
-initializing the client library to change this default.
+client library. Use the `AddUniverseDomainOption` when initializing the client
+library to change this default.
 
 @snippet client_samples.cc set-client-universe-domain
 

google/cloud/storage/doc/storage-main.dox

@@ -135,8 +135,8 @@ more conservative approach:
 @page storage-universe-domain-example Override the Default Universe Domain
 
 In some cases, you may need to override the default universe domain used by the
-client library. Use the `google::cloud::AddUniverseDomainOption` when
-initializing the client library to change this default.
+client library. Use `AddUniverseDomainOption` when initializing the client
+library to change this default.
 
 @snippet storage_client_initialization_samples.cc set-client-universe-domain
 */