Update readme bash code

README.md

@@ -69,23 +69,32 @@ This model is a Kinyarwanda-to-English machine translation model, it was built a
 
 ## Translation
 To install joeyNMT run:
->$ git clone https://github.com/joeynmt/joeynmt.git
+```
+$ git clone https://github.com/joeynmt/joeynmt.git
 $ cd joeynmt
 $ pip install . -e
+```
 
 Interactive translation(stdin):
->$ python -m joeynmt translate configs/args.yaml
+```
+$ python -m joeynmt translate configs/args.yaml
+```
 
 File translation:
->$ python -m joeynmt translate configs/args.yaml < src_lang.txt > hypothesis_trg_lang.txt
+```
+$ python -m joeynmt translate configs/args.yaml < src_lang.txt > hypothesis_trg_lang.txt
+```
 
 ## Accuracy measurement
 Sacrebleu installation:
-> $ pip install sacrebleu
+```
+$ pip install sacrebleu
+```
 
 Measurement(bleu_score, chrf):
->  $ sacrebleu reference.tsv -i hypothesis.tsv -m bleu chrf 
-
+```
+$ sacrebleu reference.tsv -i hypothesis.tsv -m bleu chrf 
+```
 
 ## To-do
 
@@ -98,8 +107,10 @@ The following result was obtained using sacrebleu.
 
 
 Kinyarwanda-to-English:
->Blue: 79.87
->Chrf: 84.40
+```
+Blue: 79.87
+Chrf: 84.40
+```