docs/stdlib.md in rbs-1.2.1 vs docs/stdlib.md in rbs-1.3.0

@@ -55,10 +55,10 @@
 It generate a simple prototype in the sense that all of the types included are `untyped`.
 But it will help you to have an overview of the signatures you are trying to write.
 
 ### What to do with existing RBS files
 
-Generating prototypes will override everything, so the problem is if there is a RBS files already.
+Generating prototypes will overwrite existing RBS files, which might be undesirable.
 You can try to find missing parts, or you can start from the scratch.
 
 One non-trivial but absolutely better solution is to make a tool:
 
 1. To load type definitions from existing RBS file, and