patch 8.2.0660: the search.c file is a bit big

Problem:    The search.c file is a bit big.
Solution:   Split off the text object code to a separate file. (Yegappan
            Lakshmanan, closes #6007)
diff --git a/src/version.c b/src/version.c
index d3a1b0b..ad2e1c3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    660,
+/**/
     659,
 /**/
     658,