Update README.md

Author: Ducasse

README.md

@@ -1,17 +1,14 @@
 # Pharo by Example 90' repository is now at https://github.com/SquareBracketAssociates/NewPharoByExample9/
 
-Why? because the history looks corrupted and we could not push anymore. 
+Why? Because the history looks corrupted and we could not push anymore, even after clean clone. 
+I do not have the expertise to understand why and how to fix this.
 So to be able to work and test we created a (temporary) new repository
 
 This one should be read only. 
 
-
 # PharoByExample90
 A new version of Pharo by example for Pharo. You can find the automatic build at 
 https://github.com/SquareBracketAssociates/PharoByExample9/releases/download/latest/PBE9-wip.pdf
 
 Look here for more [Books and Booklets](http://books.pharo.org/).
-The pdf of the current book should be available on the release tab of this page. 
-
-
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+The pdf of the current book should be available on the release tab of this page.