updated for version 7.3.645
Problem:    No tests for patch 7.3.625 and 7.3.637.
Solution:   Add more tests for the "gn" command and try/catch. (Christian
            Brabandt)
diff --git a/src/testdir/test53.in b/src/testdir/test53.in
index cc333c7..be76b05 100644
--- a/src/testdir/test53.in
+++ b/src/testdir/test53.in
@@ -34,7 +34,13 @@
 gnd
 /[a]bcdx
 :1
-2gnd
+2gnd/join
+/$
+0gnd
+/\>\zs
+0gnd/^
+gnd$h/\zs
+gnd
 :/^start:/,/^end:/wq! test.out
 ENDTEST
 
@@ -57,4 +63,8 @@
 one
 two
 abcdx | abcdx | abcdx
+join 
+lines
+zero width pattern
+delete first and last chars
 end: