Changed markdown to rst, fixed a typo.

Signed-off-by: Maciej Kurc <mkurc@antmicro.com>

tests/net_attr/README.md

diff --git a/tests/net_attr/README.md b/tests/net_attr/README.md
deleted file mode 100644
index 82a681f..0000000
--- a/tests/net_attr/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Test for multiple occurrence of the same numerical net id in the "netnames" list.
-
-When connecting a singal through multiple wires Yosys assigns name of each of them to the same net id. Such a case triggered a bug in V2X causing it to crash. This test verifies that the reworked handling of "netnames" in V2X behaves properly.

tests/net_attr/README.rst

diff --git a/tests/net_attr/README.rst b/tests/net_attr/README.rst
new file mode 100644
index 0000000..9ff9d03
--- /dev/null
+++ b/tests/net_attr/README.rst
@@ -0,0 +1,4 @@
+Test for multiple occurrence of the same numerical net id in the "netnames" list.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+When connecting a signal through multiple wires Yosys assigns name of each of them to the same net id. Such a case triggered a bug in V2X causing it to crash. This test verifies that the reworked handling of "netnames" in V2X behaves properly.