Clueless questions 3, 4 & 5 + HP LaserJet Thots

[Norman Dolph <NEDOLPH@AOL.COM>]

First thanks to all who were helpful with 1 and 2

3. The documentation and other code I have examined often sets flags to ' '
(that is two apostrophies separated by one space).
Is this functionally equivalent to setting it = to ''  (two apostrophies with
no space between them)

Is this    ' '     setting the value to: NULL,  An empty String, or a string
that holds exactly one space?
--------------
4. What are the hard rules for what MUST ALWAYS BE INDENTED, and
                                                   MUST NEVER BE INDENTED

5. Is the command MOVE  'FOO' to $BAR  fully equivalent to
    the statement  LET $BAR = 'FOO'
    If you had to code a lot of these, which is the more elegant way to do
it.

Many thanks
Norman Dolph

PS every body with HP Printer questions should get, what i assume is still
free, from HP -- the HP HPCL Technical Manual.  When you open a New laserjet,
the USER manual inside comes with a coupon for the TECHNICAL manual.  Mail it
in and they send you one.  At least they did with my model 4 and 5's.

All of the strings for rules, shading, fonts, duplex printing  and character
sets are there.  It is very helpful.  The User manual only scratches the
surface.