readme: minor fixes

README.md

@@ -24,7 +24,7 @@ The original training dataset contains 31,756 annotated tweets. Our new training
 
 The test dataset remains unmodified and contains 3,528 tweets.
 
-Twitter user mentions were substituted by @USER and URLs have been substitute by URL.
+Twitter user mentions were substituted by `@USER` and URLs have been substitute by `URL`.
 
 Each instance contains up to 1 labels corresponding to one of the following sub-task:
 
@@ -42,7 +42,7 @@ The dataset is based on Turkish.
 
 ### Data Instances
 
-A binary dataset with with (NOT) Not Offensive and (OFF) Offensive tweets.  
+A binary dataset with with (`NOT`) Not Offensive and (`OFF`) Offensive tweets.  
 
 # Acknowledgements