r.surf.area manual needs updating

[cmbarton]

The manual for r.surf.area seems to be out of date with respect to the information generated by the program. Here is what the module reports:

r.surf.area input=elevation.dem@PERMANENT
Null value area ignored in calculation 2.394900e+06
Plan area used in calculation: 2.644920e+08
Surface Area Calculation(low, high, avg): 2.701080e+08 2.732753e+08 2.716916e+08
Current Region plan area: 2.654802e+08
Estimated Region Surface Area: 2.727067e+08
Done.

But here is what the manual says it reports:

Reported totals are:

1. "Plan" area of NULL values within the current GRASS region

2. "Plan" area within calculation region (rows-1 * cols-1 * cellarea)

3. Average of the minimum and maximum calculated 3d triangle area within this region

4. "Plan" area within current GRASS region (rows * cols * cellarea)

5. Scaling of calculated area to current GRASS region (see NOTE)

Maybe it is just a simple change of wording for each entry, but someone who is familiar with the command ought to check to ensure that this is all that is needed

[neteler]

Please update the manual directly in SVN.