t.rast.line manual: remove html from links text (#1058)

src/temporal/t.rast.line/t.rast.line.html

@@ -171,7 +171,7 @@ <h3>Example 4</h3>
 <p>
 Whether this was the right color choice is debatable, but, the colors 
 of the graph match those of the zones of the map. Note that with the 
-<b>-g</b>, vertical grid lines are drawn.
+<b>g</b> flag, vertical grid lines are drawn.
 
 <p>
 <div align="center" style="margin: 10px">
@@ -226,9 +226,9 @@ <h2>Acknowledgements</h2>
 <h2>SEE ALSO</h2>
 
 <em>
-<a href="https://grass.osgeo.org/grass-stable/manuals/addons/t.rast.boxplot.html">r.boxplot.html</a>,
-<a href="https://grass.osgeo.org/grass-stable/manuals/addons/r.boxplot.html">r.boxplot.html</a>,
-<a href="https://grass.osgeo.org/grass-stable/manuals/addons/r.series.boxplot.html">r.series.boxplot.html</a>,
+<a href="https://grass.osgeo.org/grass-stable/manuals/addons/t.rast.boxplot.html">r.boxplot</a>,
+<a href="https://grass.osgeo.org/grass-stable/manuals/addons/r.boxplot.html">r.boxplot</a>,
+<a href="https://grass.osgeo.org/grass-stable/manuals/addons/r.series.boxplot.html">r.series.boxplot</a>,
 <a href="https://grass.osgeo.org/grass-stable/manuals/addons/d.vect.colbp.html">d.vect.colbp</a>,
 <a href="https://grass.osgeo.org/grass-stable/manuals/addons/r.scatterplot.html">r.scatterplot</a>,
 <a href="https://grass.osgeo.org/grass-stable/manuals/r.stats.zonal.html">r.stats.zonal</a>,