*: Partial string handling refactoring

Main points:

- Replace `char_u` with `char` in some cases.
- Remove `str[len] = NUL` hack in some cases when `str` may be considered
  `const`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/nvim/keymap.c b/src/nvim/keymap.c
index 94bbaf4239..72b0d0aa40 100644
--- a/src/nvim/keymap.c
+++ b/src/nvim/keymap.c
@@ -843,10 +843,10 @@ char_u *replace_termcodes(const char_u *from, const size_t from_len,
       // If "mapleader" or "maplocalleader" isn't set use a backslash.
       if (end - src >= 7 && STRNICMP(src, "<Leader>", 8) == 0) {
         len = 8;
-        p = get_var_value((char_u *)"g:mapleader");
+        p = get_var_value("g:mapleader");
       } else if (end - src >= 12 && STRNICMP(src, "<LocalLeader>", 13) == 0) {
         len = 13;
-        p = get_var_value((char_u *)"g:maplocalleader");
+        p = get_var_value("g:maplocalleader");
       } else {
         len = 0;
         p = NULL;