[mod] readme

readme.md

@@ -40,7 +40,7 @@ transforms a template string to its refined version by substituting its placehol
 
 #### basic
 
-```
+```sh
 echo '{{flowers}} are {{color}}' | coin -a 'flowers:roses' -a 'color:red'
 
 # roses are red
@@ -48,20 +48,20 @@ echo '{{flowers}} are {{color}}' | coin -a 'flowers:roses' -a 'color:red'
 
 The same result can be produced by using multiple `coin` calls:
 
-```
+```sh
 echo '{{flowers}} are {{color}}' | coin -a 'flowers:roses' | coin -a 'color:red'
 ```
 
 In some contextes curly brackets might might be reserved or not available for other reasons. This can be mitigated by using different placeholder indicators:
 
-```
+```sh
 echo '<<flowers>> are <<color>>' | coin -o '<<' -c '>>' -a 'flowers:roses' -a 'color:red'
 ```
 
 
 #### file arguments
 
-```
+```sh
 echo -n "cornflowers" > /tmp/flowers.txt
 echo -n "blue" > /tmp/color.txt
 echo '{{flowers}} are {{color}}' | coin -a 'flowers:@/tmp/flowers.txt' -a 'color:@/tmp/color.txt'
@@ -72,7 +72,7 @@ echo '{{flowers}} are {{color}}' | coin -a 'flowers:@/tmp/flowers.txt' -a 'color
 
 #### data file
 
-```
+```sh
 echo -e "flowers: daffodills\ncolor: yellow" > /tmp/data.yaml
 echo '{{flowers}} are {{color}}' | coin -d /tmp/data.yaml