patch 8.2.2213: checking white space around -> is not backwards compatible

Problem:    Checking white space around -> is not backwards compatible.
Solution:   Only check white space around =>.
diff --git a/src/userfunc.c b/src/userfunc.c
index ea6fa10..2bae9ef 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -570,7 +570,7 @@
 					    &varargs, NULL, FALSE, NULL, NULL);
     if (ret == FAIL
 		  || (s = skip_arrow(*arg, equal_arrow, &ret_type,
-							&white_error)) == NULL)
+				   equal_arrow ? &white_error : NULL)) == NULL)
     {
 	if (types_optional)
 	    ga_clear_strings(&argtypes);
diff --git a/src/version.c b/src/version.c
index 75a1e4b..2a85bb3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2213,
+/**/
     2212,
 /**/
     2211,