patch 8.0.1844: superfluous quickfix code, missing examples

Problem:    Superfluous quickfix code, missing examples.
Solution:   Remove unneeded code.  Add a few examples.  Add a bit more
            testing. (Yegappan Lakshmanan, closes #2916)
diff --git a/src/version.c b/src/version.c
index 788ba24..145167d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1844,
+/**/
     1843,
 /**/
     1842,