gotest: show the test file pattern in "no test files" error

Fixes #190.

R=r
https://golang.org/cl/154142

diff --git a/src/cmd/gotest/gotest b/src/cmd/gotest/gotest
index 87bb7fafb0246dd76a879c317c7b7d627cc54053..584578e91f65bbb7f8d2a5e64c7285a452af1aa7 100755 (executable)
--- a/src/cmd/gotest/gotest
+++ b/src/cmd/gotest/gotest
@@ -70,7 +70,7 @@ esac
 
 case "x$gofiles" in
 x)
-       echo 'no test files found' 1>&2
+       echo 'no test files found (*_test.go)' 1>&2
        exit 2
 esac