libgis: fix doxygen docs (close tags)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@51104 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/token.c

@@ -54,8 +54,8 @@ char **G_tokenize(const char *buf, const char *delim)
   
   This fuction behaves similarly to G_tokenize().
 
-  It introduces <em>valchar<em> which defines borders of token. Within
-  token <em>delim<em> is ignored.
+  It introduces <em>valchar</em> which defines borders of token. Within
+  token <em>delim</em> is ignored.
   
   Example:
   \code