r.pack manual: explain current region behaviour; style cosmetics

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@68260 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.pack/r.pack.html

@@ -1,28 +1,31 @@
 <h2>DESCRIPTION</h2>
 
 <em>r.pack</em> collects raster map elements and support files and
-compressed them using <em>gzip</em> algorithm for copying. The packed
-file can be afterwards unpacked
+compressed them using <em>gzip</em> algorithm for copying. The resulting
+packed file can be afterwards unpacked within a GRASS GIS session
 by <em><a href="r.unpack.html">r.unpack</a></em>.
 
+Since the selected raster map is not exported but natively stored, the
+current region is not respected. Hence <em>r.pack</em> stores the entire
+raster map.
 
 <h2>NOTES</h2>
 
-Name of the pack file is determined by default from <b>input</b>
-parameter. Optionally the name can be given by <b>output</b> parameter.
+By default, the name of the pack file is determined from the <b>input</b>
+parameter. Optionally a different name can be given by <b>output</b> parameter.
 
 Currently only 2D raster maps are supported.
 
 
 <h2>EXAMPLE</h2>
 
-Pack up raster map <i>aspect</i> into <i>aspect.pack</i> file.
+Pack up the entire raster map <i>aspect</i> into <i>aspect.pack</i> file:
 
 <div class="code"><pre>
 r.pack input=aspect
 </pre></div>
 
-the raster map can be afterwards unpacked by
+The packed raster map file  <i>aspect.pack</i> can afterwards be unpacked by
 
 <div class="code"><pre>
 r.unpack input=aspect.pack
@@ -31,11 +34,11 @@ r.unpack input=aspect.pack
 <h2>SEE ALSO</h2>
 
 <em>
-  <a href="r.unpack.html">r.unpack</a>,
-  <a href="r.in.gdal.html">r.in.gdal</a>,
-  <a href="g.copy.html">g.copy</a>,
-  <a href="r.proj.html">r.proj</a>,
-  <a href="v.unpack.html">v.unpack</a>
+<a href="r.unpack.html">r.unpack</a>,
+<a href="r.in.gdal.html">r.in.gdal</a>,
+<a href="g.copy.html">g.copy</a>,
+<a href="r.proj.html">r.proj</a>,
+<a href="v.unpack.html">v.unpack</a>
 </em>