* calendar() can now display formated calendars.
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Help pages:
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* The `ans` variable is editable as any other variable
* Commands history is saved before executing a command to have the correct history on crash.
* Used memory per variable is displayed by BrowserVar to give the user numbers on memory usage repartition and let the user `clear` the big ones first.
+* Autoscroll of console in GUI mode is disabled when the user scroll up until he scrolls to bottom.
Xcos
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