Audio VTS: Fix missing whitespace in error message

Test: outpout the error
Change-Id: Ibba04f12e489e3b526ae9fe4758e2ae540095d89
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/audio/common/all-versions/test/utility/src/ValidateXml.cpp b/audio/common/all-versions/test/utility/src/ValidateXml.cpp
index e54914d..bdafa82 100644
--- a/audio/common/all-versions/test/utility/src/ValidateXml.cpp
+++ b/audio/common/all-versions/test/utility/src/ValidateXml.cpp
@@ -162,8 +162,8 @@
            << "\n                 Which is: " << xmlFileName
            << "\n In the following folders: " << xmlFileLocationsExpr
            << "\n                 Which is: " << ::testing::PrintToString(xmlFileLocations)
-           << (atLeastOneRequired ? "Where at least one file must be found."
-                                  : "Where no file might exist.");
+           << (atLeastOneRequired ? "\nWhere at least one file must be found."
+                                  : "\nWhere no file might exist.");
 }
 
 template ::testing::AssertionResult validateXmlMultipleLocations<true>(const char*, const char*,