Don't double-space captured output in test wrapper

Lines read already have newlines, so don't need the implicit newline
added by calling `print` in a loop over the lines. One call to print
with one newline is cheaper and doesn't add the double newlines.

Author: ldrumm

test/conformance/cts_exe.py

@@ -54,6 +54,5 @@
         print(signal.strsignal(abs(rc)))
 
     print("#### GTEST_OUTPUT ####", file=sys.stderr)
-    for output in output_list:
-        print(output, file=sys.stderr)
+    print(''.join(output_list), file=sys.stderr)
     print("#### GTEST_OUTPUT_END ####", file=sys.stderr)