Adresss further comments

spec/src/main/asciidoc/architecture.adoc

@@ -154,7 +154,7 @@ Global tags and tags registered with the metric are included in the output retur
 
 Global tags MUST NOT be added to the `MetricID` objects. Global tags must be included in list of tags when metrics are exported.
 
-NOTE: In application servers with multiple applications deployed, values of the reserved tag `mp_app` distinguishing metrics
+NOTE: In application servers with multiple applications deployed, values of the reserved tag `mp_app` distinguish metrics
  from different applications and must not be used for any other purpose. For details,
  see section <<app-servers>>.
 
@@ -294,7 +294,7 @@ The value of the `mp_app` tag should be passed by the application server to the
 It should be possible to override this value by bundling the file `META-INF/microprofile-config.properties` within the application archive
 and setting a custom value for the property `mp.metrics.appName` inside it.
 
-It is allowed for application servers to choose to not add the `mp_app`` tag at all. Implementations may differ in how they handle cases where 
+It is allowed for application servers to choose to not add the `mp_app` tag at all. Implementations may differ in how they handle cases where 
 metrics are registered with the same name from two or more applications running in the same server.  This behavior is not expected to be 
 portable across vendors.