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, 3 deletions

diff --git a/strings/ctype-czech.c b/strings/ctype-czech.c
index e3abebad91d..a7efd20b259 100644
--- a/strings/ctype-czech.c
+++ b/strings/ctype-czech.c
@@ -276,9 +276,7 @@ static int my_strnncoll_czech(CHARSET_INFO *cs __attribute__((unused)),
 static
 int my_strnncollsp_czech(CHARSET_INFO * cs, 
                          const uchar *s, size_t slen, 
-                         const uchar *t, size_t tlen,
-                         my_bool diff_if_only_endspace_difference
-                         __attribute__((unused)))
+                         const uchar *t, size_t tlen)
 {
   for ( ; slen && s[slen-1] == ' ' ; slen--);
   for ( ; tlen && t[tlen-1] == ' ' ; tlen--);