patch 8.2.4948: cannot use Perl heredoc in nested :def function

Problem:    Cannot use Perl heredoc in nested :def function. (Virginia
            Senioria)
Solution:   Only concatenate heredoc lines when not in a nested function.
            (closes #10415)
diff --git a/src/version.c b/src/version.c
index 1965373..aaa1e02 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4948,
+/**/
     4947,
 /**/
     4946,