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-rw-r--r--Test/B01cd.ztst10
1 files changed, 10 insertions, 0 deletions
diff --git a/Test/B01cd.ztst b/Test/B01cd.ztst
index f6c9fc88f..1995971cf 100644
--- a/Test/B01cd.ztst
+++ b/Test/B01cd.ztst
@@ -77,12 +77,22 @@
 # If either or both of the '>' and '?' sets of lines is absent, it is
 # assumed the corresponding output should be empty and it is an error if it
 # is not.  If '<' is empty, stdin is an empty (but opened) file.
+#
+# It is also possible to add lines in the redirection section beginning
+# with `F:'.  The remaining text on all such lines will be concatenated
+# (with newlines in between) and displayed in the event of an error.
+# This text is useful for explaining certain frequent errors, for example
+# ones which may arise from the environment rather than from the shell
+# itself.  (The example below isn't particularly useful as errors with
+# `cd' are unusual.)
  cd cdtst.tmp/sub/fake &&
  pwd &&
  print $PWD
 0q:Preserving symbolic links in the current directory string
 >$mydir/cdtst.tmp/sub/fake
 >$mydir/cdtst.tmp/sub/fake
+F:This test shouldn't really fail.  The fact that it has indicates
+F:something is broken.  But you already knew that.
 
  cd ../../.. &&
  pwd &&