DoIt to convert all tabs in workspace to spaces

Hi all.

In Emacs, I have an "untabify" command I can run on a buffer.
I would like to do the same thing in a workspace so that I can align all my
stuff.

For example, here is a section of my Parser Expression Grammar where I would
like to
align all the '<-'



*Page <-  ( Remove /  Break /  ReturnOne /  Style /   Structure /
Paragraph  )*
Flow           <-    ReturnOne / Remove  /  Break /   Style /  Structure
/ .
Structure <-     Break / Div / HorizontalRule / List / Link /
TableMergedRow / TableWellFormed / Transclusion
Style <-   TextFormatting / NameDate / Heading  
Paragraph <- ^Flow{1, EndOfLine EndOfLine}
Break <- ^EndOfLine ^EndOfLine   /*
https://en.wikipedia.org/wiki/Help:Wikitext#Line_breaks */
ReturnOne                       <- ^EndOfLine
Transclusion <- "{{" .+  "}}"*

I would also like to remove all the "trailing spaces" after the last
character before a newline.

Is this doable?

thanks in advance.






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