[SUGGESTION] clean up extra whitespace at the end of line for generated code

[farmerpiki]

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For variable declarations and return statements at the very least, in the lowered c++ code a space is present at the end of the line after the ; in the generated code, this is mostly harmless, except I hate seeing it in my git diff cause it's set up to highlight extra spacing.

You can see an example of source and result attached as text files to bug report #1200