lint these lines

Author: gregsdennis

jsonschema-validation.md

@@ -207,7 +207,8 @@ Omitting this keyword has the same behavior as a value of 0.
 #### `pattern` {#pattern}
 
 The value of this keyword MUST be a string. This string SHOULD be a valid
-regular expression as indicated in [JSON Schema Core, section 6.3](./jsonschema-core.md#regex).
+regular expression as indicated in
+[JSON Schema Core, section 6.3](./jsonschema-core.md#regex).
 
 A string instance is considered valid if the regular expression matches the
 instance successfully. Recall: regular expressions are not implicitly anchored.