patch 9.1.1219: Strange error with wrong type for matchfuzzy() "camelcase"

Problem:  Strange error with type for matchfuzzy() "camelcase".
Solution: Show the error "Invalid value for argument camelcase" instead
          of "Invalid argument: camelcase" (zeertzjq).

Note that using tv_get_string() will lead to confusion, as when the
value cannot be converted to a string tv_get_string() will also give an
error about that, but "camelcase" takes a boolean, not a string.  Also
don't use tv_get_string() for the "limit" argument above.

closes: #16926

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/search.c b/src/search.c
index c7ae4f8..2698358 100644
--- a/src/search.c
+++ b/src/search.c
@@ -5000,7 +5000,8 @@
 		    || di->di_tv.vval.v_string == NULL
 		    || *di->di_tv.vval.v_string == NUL)
 	    {
-		semsg(_(e_invalid_argument_str), tv_get_string(&di->di_tv));
+		semsg(_(e_invalid_value_for_argument_str_str), "key",
+						    tv_get_string(&di->di_tv));
 		return;
 	    }
 	    key = tv_get_string(&di->di_tv);
@@ -5019,21 +5020,21 @@
 	{
 	    if (di->di_tv.v_type != VAR_NUMBER)
 	    {
-		semsg(_(e_invalid_argument_str), tv_get_string(&di->di_tv));
+		semsg(_(e_invalid_value_for_argument_str), "limit");
 		return;
 	    }
 	    max_matches = (long)tv_get_number_chk(&di->di_tv, NULL);
 	}
 
 	if ((di = dict_find(d, (char_u *)"camelcase", -1)) != NULL)
-        {
+	{
 	    if (di->di_tv.v_type != VAR_BOOL)
 	    {
-		semsg(_(e_invalid_argument_str), "camelcase");
+		semsg(_(e_invalid_value_for_argument_str), "camelcase");
 		return;
 	    }
 	    camelcase = tv_get_bool_chk(&di->di_tv, NULL);
-        }
+	}
 
 	if (dict_has_key(d, "matchseq"))
 	    matchseq = TRUE;