Update README.md

Author: dsyme

README.md

@@ -19,7 +19,7 @@ signature files (`*.fsi`) in the FSharp.Core implementation.
 
 ## Contributing to Generation of API Docs
 
-The docs generated by using `fsdocs` tool from FSharp.Formatting.  If you want to improve the generation process:
+The docs are generated by using `fsdocs` tool from FSharp.Formatting.  If you want to improve the generation process:
 
 * Contribute to the API Docs mode and/or HTML generator in [FSharp.Formatting.ApiDocs](https://github.com/fsprojects/FSharp.Formatting/tree/master/src/FSharp.Formatting.ApiDocs) and [the `fsdocs` tool](https://github.com/fsprojects/FSharp.Formatting/tree/master/src/FSharp.Formatting.CommandTool)