Better highlighting in readme

README.md

@@ -60,15 +60,15 @@ Best efforts have been made for these to support normal Symphony enumerators of
 
 ##### Filter by key (default)
 
-```
+```yaml
 colour
 ```
 
 Normal default filtering without any `*:` conditions will search on keys. This will return all the entries where a key of `colour` exists (whether it has a value or not).
 
 ##### Filter by values
 
-```
+```yaml
 value: red
 ```
 
@@ -77,23 +77,23 @@ This will return all entries where one pair exists that has the value of `red`.
 
 ##### Filter by exact key/value pair
 
-```
+```yaml
 key-equals: colour=red
 ```
 
 This will return all entries where the `Colour` key equals `red`. You can chain this as well with `key-equals: colour=red, shape=square` that will get all entries where the `Colour` is `red` and the `Shape` is `square`.
 
 ##### Filter by exact key/value pair
 
-```
+```yaml
 key-contains: colour=red
 ```
 
 This will return all entries where the `Colour` key contains the word `red`, e. g. it matches `red` in `blue, green, red`. You can chain this as well with `key-contains: colour=red, shape=square` that will get all entries where `Colour` contains the word `red` and `Shape` contains `square`.
 
 ##### Filter by value range
 
-```
+```yaml
 key-ranges: 5..10
 key-ranges: 5...
 key-ranges: ...10