patch 7.4.2100

Problem:    "cgn" and "dgn" do not work correctly with a single character
            match and the replacement includes the searched pattern. (John
            Beckett)
Solution:   If the match is found in the wrong column try in the next column.
            Turn the test into new style. (Christian Brabandt)

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2100,
 /**/
     2099,
 /**/