patch 8.2.1110: Vim9: line continuation does not work in function arguments

Problem:    Vim9: line continuation does not work in function arguments.
Solution:   Pass "evalarg" to get_func_tv().  Fix seeing double quoted string
            as comment.
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index 0e9ffeb..910fdfd 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -3,6 +3,7 @@
 varnumber_T num_modulus(varnumber_T n1, varnumber_T n2);
 void eval_init(void);
 void eval_clear(void);
+void fill_evalarg_from_eap(evalarg_T *evalarg, exarg_T *eap, int skip);
 int eval_to_bool(char_u *arg, int *error, exarg_T *eap, int skip);
 int eval_expr_valid_arg(typval_T *tv);
 int eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv);
@@ -31,6 +32,7 @@
 char_u *eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext);
 char_u *eval_next_line(evalarg_T *evalarg);
 char_u *skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg);
+char_u *skipwhite_and_linebreak_keep_string(char_u *arg, evalarg_T *evalarg);
 void clear_evalarg(evalarg_T *evalarg, exarg_T *eap);
 int eval0(char_u *arg, typval_T *rettv, exarg_T *eap, evalarg_T *evalarg);
 int eval1(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
diff --git a/src/proto/userfunc.pro b/src/proto/userfunc.pro
index f69f77d..75a1562 100644
--- a/src/proto/userfunc.pro
+++ b/src/proto/userfunc.pro
@@ -7,7 +7,7 @@
 int get_lambda_tv(char_u **arg, typval_T *rettv, evalarg_T *evalarg);
 char_u *deref_func_name(char_u *name, int *lenp, partial_T **partialp, int no_autoload);
 void emsg_funcname(char *ermsg, char_u *name);
-int get_func_tv(char_u *name, int len, typval_T *rettv, char_u **arg, funcexe_T *funcexe);
+int get_func_tv(char_u *name, int len, typval_T *rettv, char_u **arg, evalarg_T *evalarg, funcexe_T *funcexe);
 char_u *fname_trans_sid(char_u *name, char_u *fname_buf, char_u **tofree, int *error);
 ufunc_T *find_func(char_u *name, int is_global, cctx_T *cctx);
 int call_user_func_check(ufunc_T *fp, int argcount, typval_T *argvars, typval_T *rettv, funcexe_T *funcexe, dict_T *selfdict);