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-rw-r--r--src/core-commands.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/core-commands.c b/src/core-commands.c
index 7e6dbfa..9281d0d 100644
--- a/src/core-commands.c
+++ b/src/core-commands.c
@@ -1010,6 +1010,9 @@ teco_state_start_delete_chars(teco_machine_main_t *ctx, GError **error)
* This can be an ASCII <code> or Unicode codepoint
* depending on Scintilla's encoding of the current
* buffer.
+ * Invalid Unicode byte sequences are reported as
+ * -1 or -2.
+ *
* - If <n> is 0, return the <code> of the character
* pointed to by dot.
* - If <n> is 1, return the <code> of the character