Fix intermittent failures when "svn add" guesses a near-empty file is binary and hence

the output is different.

--- subversion-1.14.1/subversion/tests/cmdline/svntest/main.py.testnoautoprops

+++ subversion-1.14.1/subversion/tests/cmdline/svntest/main.py

@@ -691,6 +691,7 @@

 [miscellany]

 interactive-conflicts = false

+enable-auto-props = no

 """

     if exclusive_wc_locks:

       config_contents += """