Textcode noindent

[glelouet]

fix the formatter adding arbitrary spaces/indentation in a text block

1. the base idea is to build on a StringBuilder when generating a textblock against a formatter, only appending the sb at the end, rather than directly append all lines.
2. This requires to have visibility of the newline property used. So IJFormatter, JFormatter, SourcePrintWriter all have a getter for that internal value (which in the case of JFormater calls the internal sourceprintwriter)
3. ran sh/install and a lot of things changed, no idea why. At least the output of the textblock is correct.

[glelouet]

ok, all those random space changes are because when I checkout the GenerateTestFiles, git replaces its starting spaces with tabs, including in the textblock ; but once placed in comment, the now-tab spacing is no more replaced with spaces because it's not starting anymore.

Its not a problem for the decoration spaces, which are discarded at compile time, but for that one line that is indented it becomes a issue.