t7810: avoid unportable use of "echo"

diff --git a/t/README b/t/README
index 428ee05c4a5b844815ff4f9356b71bb147cb42a6..238729c5b7168919ab6f79cf0a0b11c4833ddeae 100644 (file)
--- a/t/README
+++ b/t/README
@@ -587,6 +587,11 @@ use these, and "test_set_prereq" for how to define your own.
    Test is not run by root user, and an attempt to write to an
    unwritable file is expected to fail correctly.
 
+ - LIBPCRE
+
+   Git was compiled with USE_LIBPCRE=YesPlease. Wrap any tests
+   that use git-grep --perl-regexp or git-grep -P in these.
+
 Tips for Writing Tests
 ----------------------