Fixing flake and black issues in code, enabling  the same in tox

Change-Id: Id817198c20c039029c8b053e8eac0a8482d72a48
Signed-off-by: preethika.p <preethika.p@tataelxsi.co.in>
diff --git a/tox.ini b/tox.ini
index 183bf6c..f1aeb9b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,8 +33,8 @@
 deps = black
 skip_install = true
 commands =
-        - black --check --diff osm_lcm/
-        - black --check --diff setup.py
+         black --check --diff osm_lcm/
+         black --check --diff setup.py
 
 
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