[texhax] Adjusting bar width

[Ivan Debono]

Is there any way in which I can modify the length of the bars produced using 
\overline and \underline? I want the length to be somewhere between a bar 
produced with \bar and one produced with \overline. I've been searching for 
a macro all over the place, but I haven't found anything yet.

Regards, and thanks in advance,

Mr. Ivan Debono

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