MDEV-8360 Clean-up CHARSET_INFO: strnncollsp: diff_if_only_endspace_difference

- Removing the "diff_if_only_endspace_difference" argument from
  MY_COLLATION_HANDLER::strnncollsp(), my_strnncollsp_simple(),
  as well as in the function template MY_FUNCTION_NAME(strnncollsp)
  in strcoll.ic

- Removing the "diff_if_only_space_different" from ha_compare_text(),
  hp_rec_key_cmp().

- Adding a new function my_strnncollsp_padspace_bin() and reusing
  it instead of duplicate code pieces in my_strnncollsp_8bit_bin(),
  my_strnncollsp_latin1_de(), my_strnncollsp_tis620(),
  my_strnncollsp_utf8_cs().

- Adding more tests for better coverage of the trailing space handling.

- Removing the unused definition of HA_END_SPACE_ARE_EQUAL

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/events.cc b/sql/events.cc
index f428bc17927..5ef4d6f55a5 100644
--- a/sql/events.cc
+++ b/sql/events.cc
@@ -102,7 +102,7 @@ ulong Events::inited;
 int sortcmp_lex_string(LEX_STRING s, LEX_STRING t, CHARSET_INFO *cs)
 {
  return cs->coll->strnncollsp(cs, (uchar *) s.str,s.length,
-                                  (uchar *) t.str,t.length, 0);
+                                  (uchar *) t.str,t.length);
 }