Update vectorintro.html (#224)

Don't SEE ALSO self.

vector/vectorintro.html

@@ -66,7 +66,7 @@ with <a href="v.support.html">v.support</a>.
 GRASS vector map processing is always performed on the full map.
 If this is not desired, the input map has to be clipped to the
 current region beforehand (<a href="v.in.region.html">v.in.region</a>,
-<a href="v.overlay.html">v.overlay</a>,<a href="v.select.html">v.select</a>).
+<a href="v.overlay.html">v.overlay</a>, <a href="v.select.html">v.select</a>).
 
 <h3>Vector model and topology</h3>
 
@@ -390,7 +390,6 @@ a point cloud.
 <ul>
   <li><a href="rasterintro.html">Introduction to raster data processing</a></li>
   <li><a href="raster3dintro.html">Introduction to 3D raster data (voxel) processing</a></li>
-  <li><a href="vectorintro.html">Introduction to vector data processing</a></li>
   <li><a href="imageryintro.html">Introduction to image processing</a></li>
   <li><a href="temporalintro.html">Introduction into temporal data processing</a></li>
   <li><a href="databaseintro.html">Introduction to database management</a></li>