README: use double backticks for filename markup (ReST)

diff --git a/README b/README
index b5866d6eb9e57c8a8522fee9e36e7e3545d3b353..377457139f47b56e34ac457fa1a9cf6c607a4cc9 100644 (file)
--- a/README
+++ b/README
@@ -51,7 +51,7 @@ standard::
 Usage
 =====
 
-See the tests in `FFT_tools.py` for simple examples.
+See the tests in ``FFT_tools.py`` for simple examples.
 
 
 Testing