Most "programmers' editors" have an option to use spaces instead of tabs, and to set the number of spaces to use.
Emacs has commands (look for "tabify" and "untabify" in the online help) to replace tabs with spaces, and vice-versa with a single keystroke.

Note: Most programmers prefer to use spaces instead of tabs because tab sizes vary between machines, programs, and even within a single program.  As long as a fixed-width font is used, spaces are always the same size.  This helps a lot when reviewing code written by someone else, as it ensures that things line up correctly on the reviewer's system.

Craig White wrote: 
IANAP (I am not a programmer)   ;-)

but I have been impersonating one lately...

I submitted code to horde project and one thing they objected to was
using tabs for indents instead of spaces. I now know how to create
unified diffs, diffs against cvs and this all is a learning process for
me.

Language is php

Editor is emacs

It seems that there are times when tabs are automatically converted into
space indentations and sometimes they aren't.

Is there a method to convert all the tabs to spaces?

Craig

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