précise des détails dans le readme

README.md

@@ -5,7 +5,7 @@ Simple mailing script.
 **Table of content**
 
 - [Installation](#installation)
-- [Input format](#input_format)
+- [Input format](#input-format)
 - [Licence](#licence)
 
 ## Installation
@@ -34,9 +34,10 @@ following packages:
 
 The « to-file » is expected to be csv with the [default
 dialect](https://docs.python.org/3/library/csv.html?highlight=csv#dialects-and-formatting-parameters)
-(`delimiter=','`, `char delimiter='"'`).
+(delimiter = `,`, char delimiter =`"`).
 
-The first line is header. The `from` and `to` headers are exepected the be found.
+The first line declare columns headers. The `from` and `to` headers are
+expected the be found.
 
 To avoid boring repetition it is possible to declare a default column value
 using `:` in header. The default value is considered when the column is lacking,