Updates graph api docs

docs/clmc-service.md

@@ -76,9 +76,9 @@ All source code, tests and configuration files of the service can be found in th
         
         E.g. for the minio service function, the following query will be used to retrieve the data from influx (request url is /graph/build?from=1528385420&to=1528385860):
         
-            ```
-            SELECT mean(sum)/mean(count) AS mean_response_time FROM "MSDemo"."autogen".minio_http_requests_duration_seconds WHERE sfc_i='MSDemo_1' and time>=1528385420000000000 and time<1528385860000000000 GROUP BY ipendpoint, location, sf_i
-            ```
+        ```
+        SELECT mean(sum)/mean(count) AS mean_response_time FROM "MSDemo"."autogen".minio_http_requests_duration_seconds WHERE sfc_i='MSDemo_1' and time>=1528385420000000000 and time<1528385860000000000 GROUP BY ipendpoint, location, sf_i
+        ```
             
         N.B. timestamps are converted to nano seconds.