Debug t_mp_logger failures on GitHub.

Author: rdzman

lib/t/t_mp_logger.m

@@ -41,7 +41,10 @@ function t_mp_logger(quiet)
 else
     expected = sprintf('     first: ''one''\n    second: 2\n        pi: 3.1416\n\n    2.7183\n\n');
 end
-t_str_match(c, expected, [t 'mp_disp - outputs to console']);
+if ~t_str_match(c, expected, [t 'mp_disp - outputs to console']);
+    fprintf('\ngot: "%s"\n', c);
+    fprintf('exp: "%s"\n', expected);
+end
 
 c = evalc('mp_printf(''Hello %s!\n\n'', ''mp_printf''); mp_printf(''This is %d\nlines of\ntext (%s).\n'', 3, ''I think'');');
 expected = sprintf('Hello mp_printf!\n\nThis is 3\nlines of\ntext (I think).\n');
@@ -79,7 +82,10 @@ function t_mp_logger(quiet)
 end
 mp.logger.manager('clear', fname);
 t_file_match(fname, redir_disp_fname, [t 'mp_disp - file w/expected content'], {}, true);
-t_str_match(c, expected, [t 'mp_disp - outputs to console']);
+if ~t_str_match(c, expected, [t 'mp_disp - outputs to console']);
+    fprintf('\ngot: "%s"\n', c);
+    fprintf('exp: "%s"\n', expected);
+end
 t_ok(isempty(mp.logger.manager('get')), [t 'mp.logger.manage(''clear'')']);
 
 fname = sprintf('redir-printf-%d.txt', fix(rand*1e8));