Fix typo in manual.

[Ralf Wildenhues]

For maint.

Cheers,
Ralf

    Fix typo in manual.
    
    * doc/automake.texi (Simple Tests using parallel-tests): Add missing
    closing parenthesis.

diff --git a/doc/automake.texi b/doc/automake.texi
index ae5e364..939ea00 100644
--- a/doc/automake.texi
+++ b/doc/automake.texi
@@ -8716,7 +8716,7 @@ set of converted log files.  The log and HTML files are 
removed upon
 @vindex DISABLE_HARD_ERRORS
 @cindex Exit status 99, special interpretation
 @cindex hard error
-Even in the presence of expected failures (see @code{XFAIL_TESTS}, there
+Even in the presence of expected failures (see @code{XFAIL_TESTS}), there
 may be conditions under which a test outcome needs attention.  For
 example, with test-driven development, you may write tests for features
 that you have not implemented yet, and thus mark these tests as expected