fix formatting

Author: sandersn

reference/Reference-Checker-Inference.md

@@ -1,5 +1,7 @@
 
-[0]: https://github.com/microsoft/TypeScript/blob/db9e0079/src/compiler/checker.ts#L21772# Type Inference
+[0]: https://github.com/microsoft/TypeScript/blob/db9e0079/src/compiler/checker.ts#L21772
+
+# Type Inference
 
 TypeScript has a number of related techniques which together are
 called type inference: places where a type is discovered from