master f9cac26: * test/README: Document TEST_BACKTRACE_LINE_LENGTH.

[Stefan Kangas]

branch: master
commit f9cac26dc1545ce7b79c68dc2294dfba8486c48b
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    * test/README: Document TEST_BACKTRACE_LINE_LENGTH.
---
 test/README | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/README b/test/README
index fe05b54..d0da89d 100644
--- a/test/README
+++ b/test/README
@@ -81,6 +81,11 @@ Some tests might take long time to run.  In order to 
summarize the
 
     make SUMMARIZE_TESTS=<nn> ...
 
+The backtrace of failing tests are truncated to the default value of
+'ert-batch-backtrace-right-margin'.  To see more of the backtrace, use
+
+    make TEST_BACKTRACE_LINE_LENGTH=<nn> ...
+
 The tests are run in batch mode by default; sometimes it's useful to
 get precisely the same environment but run in interactive mode for
 debugging.  To do that, use