RenameVariables should not capitalize placeholder in template

[gohierf]

Following up on #711 and #712, I am surprised that RenameVariables capitalizes the placeholder when using keywords with embedded arguments as template. I don't think this is a good idea, what is the rational behind it?

BEFORE

AFTER

CODE TO REPRODUCE

My Test
    [Template]    My Keyword ${embedded arg}
    value1
    value2


*** Keywords ***
My Keyword ${embedded arg}
    [Documentation]    Just loging embedded arg value to console
    Log To Console    embedded arg: ${embedded arg}