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-rw-r--r--src/nvim/charset.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/nvim/charset.c b/src/nvim/charset.c
index 9060a0de82..1dec0beeee 100644
--- a/src/nvim/charset.c
+++ b/src/nvim/charset.c
@@ -1900,7 +1900,8 @@ void backslash_halve(char_u *p)
/// @param p
///
/// @return String with the number of backslashes halved.
-char_u* backslash_halve_save(char_u *p)
+char_u *backslash_halve_save(const char_u *p)
+ FUNC_ATTR_NONNULL_ALL FUNC_ATTR_NONNULL_RET
{
// TODO(philix): simplify and improve backslash_halve_save algorithm
char_u *res = vim_strsave(p);