docs: v.mkgrid.html fix manual typos (#4724)

vector/v.mkgrid/v.mkgrid.html

@@ -66,8 +66,8 @@ <h3>Creating a positioned grid in a latitude-longitude</h3>
 at 167deg 52min east, 47deg 6min south. For use with e.g. QGIS you can then
 pull this grid into a project with projected coordinate reference system (CRS)
 using <em>v.proj</em> before
-exporting as a Shapefile with <em>v.out.ogr</em> (within GRASS GIS you could
-just use <em>d.grid -w</em> from the projec with projected CRS for the same effect):
+exporting as a vector file with <em>v.out.ogr</em> (within GRASS GIS you could
+just use <em>d.grid -w</em> from the project with projected CRS for the same effect):
 
 <div class="code"><pre>
 v.mkgrid map=p2min_grid grid=10,12 position=coor coordinates=167:52E,47:06S box=0:02,0:02
@@ -153,7 +153,7 @@ <h3>Using hexagons for point density</h3>
 v.vect.stats points=points_of_interest areas=hexagons count_column=count
 </pre></div>
 
-User should note that some of the points may be outside the grid
+Users should note that some of the points may be outside the grid
 since the hexagons cannot cover all the area around the edges
 (the computational region extent needs to be enlarged if all points
 should be considered).
@@ -164,11 +164,6 @@ <h3>Using hexagons for point density</h3>
 v.colors map=hexagons use=attr column=count color=viridis
 </pre></div>
 
-<!--
-d.erase 77:77:77
-mogrify -trim .png
--->
-
 <center>
 <img src="v_mkgrid.png"><br>
 Point density in a hexagonal grid