patch 8.0.1660: the terminal API "drop" command doesn't support options
Problem: The terminal API "drop" command doesn't support options.
Solution: Implement the options.
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 41c7c80..48b0253 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -1778,7 +1778,7 @@
int regname; /* register name (NUL if none) */
int force_bin; /* 0, FORCE_BIN or FORCE_NOBIN */
int read_edit; /* ++edit argument */
- int force_ff; /* ++ff= argument (index in cmd[]) */
+ int force_ff; /* ++ff= argument (first char of argument) */
#ifdef FEAT_MBYTE
int force_enc; /* ++enc= argument (index in cmd[]) */
int bad_char; /* BAD_KEEP, BAD_DROP or replacement byte */