tests: add os.skip to README.md

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/tests/README.md b/tests/README.md
index c1b4cff..cbf966b 100644 (file)
--- a/tests/README.md
+++ b/tests/README.md
@@ -170,12 +170,15 @@ It is a success.
 The `$engine.skip` files (where `$engine` is an engine name, see below) describe tests that are skipped completely on a given engine.
 Usually it used with then engine `niti` because tests are too long.
 
-The `cc.skip` file describes tests that are analysed but no executable is generated.
-Usually it is because expected CC errors or missing C libraries.
+The `cc.skip` file describes tests that are analyzed but no executable is generated.
+Usually it is because of expected CC errors or missing C libraries.
 
 The `exec.skip` file describes tests that compiled but not executed.
 Usually it is because the programs are interactive or run some kind of server.
 
+The `$os.skip` file describes tests that are to be skipped completely on the given OS.
+Usually it is because of OS specific libraries.
+
 These `*.skip` files contain a list of patterns that will be used against test names.
 A single substring can thus be used to skip a full family of tests.