IMPALA-4751: Remove blank line from raw_text template

The additional blank line can break tooling which uses the
/query_profile_encoded endpoint and has been erroneously introduced in
the fix for IMPALA-3918.

Change-Id: I9b688aa9e2423b0271c8891a983e5b22707d8dbc
Reviewed-on: http://gerrit.cloudera.org:8080/5664
Reviewed-by: Jim Apple <jbapple-impala@apache.org>
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins

tests/webserver/test_web_pages.py

@@ -15,6 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
+from tests.common.impala_cluster import ImpalaCluster
 from tests.common.impala_test_suite import ImpalaTestSuite
 import requests
 
@@ -28,3 +29,14 @@ class TestWebPage(ImpalaTestSuite):
     assert page.status_code == requests.codes.ok
     page = requests.get("http://localhost:25020/memz")
     assert page.status_code == requests.codes.ok
+
+  def test_query_profile_encoded_unknown_query_id(self):
+    """Test that /query_profile_encoded error message starts with the expected line in
+    case of missing query and does not contain any leading whitespace.
+    """
+    cluster = ImpalaCluster()
+    impalad = cluster.get_any_impalad()
+    result = impalad.service.read_debug_webpage("query_profile_encoded?query_id=123")
+    assert result.startswith("Could not obtain runtime profile: Query id")
+
+

www/raw_text.tmpl

@@ -15,5 +15,7 @@ software distributed under the License is distributed on an
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
-}}
-{{contents}}
+}}{{!
+When making changes to this file, please make sure to not introduce any whitespace before
+the main content, or it may break tools relying on the content starting on the first line.
+}}{{contents}}