Fixed readme parsing

README.md

@@ -254,7 +254,7 @@ just backfit data/thoroughbred.csv config/thoroughbred.r.json -o config/thorough
 
 The above example persists the fitted coefficients to `config/thoroughbred.cf.json` and prints the summary statistics, including the standard errors, p-values and R-squared values for each of the three predictors. Below is an output sample for one predictor.
 
-```
+```txt
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 ║Regressor                     │ Coefficient│ Std. error│  P-value│     ║
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