Merge pull request #2648 from cubicdaiya/use_lit_for_mrdb

use mrb_str_xxx_lit for mrdb.

mrbgems/mruby-bin-debugger/tools/mrdb/apiprint.c

@@ -56,9 +56,9 @@ mrb_debug_eval(mrb_state *mrb, mrb_debug_context *dbg, const char *expr, size_t
      *   e
      * end
      */
-    ruby_code = mrb_str_new_cstr(mrb, "begin\n");
+    ruby_code = mrb_str_new_lit(mrb, "begin\n");
     ruby_code = mrb_str_cat(mrb, ruby_code, expr, len);
-    ruby_code = mrb_str_cat_cstr(mrb, ruby_code, "\nrescue => e\ne\nend");
+    ruby_code = mrb_str_cat_lit(mrb, ruby_code, "\nrescue => e\ne\nend");
 
     recv = dbg->regs[0];
 

mrbgems/mruby-bin-debugger/tools/mrdb/cmdprint.c

@@ -32,14 +32,14 @@ dbgcmd_print(mrb_state *mrb, mrdb_state *mrdb)
   /* eval expr */
   expr = mrb_str_new_cstr(mrb, NULL);
   for (wcnt=1; wcnt<mrdb->wcnt; wcnt++) {
-    expr = mrb_str_cat_cstr(mrb, expr, " ");
+    expr = mrb_str_cat_lit(mrb, expr, " ");
     expr = mrb_str_cat_cstr(mrb, expr, mrdb->words[wcnt]);
   }
 
   result = mrb_debug_eval(mrb, mrdb->dbg, RSTRING_PTR(expr), RSTRING_LEN(expr), NULL);
 
   /* $print_no = result */
-  s = mrb_str_cat_cstr(mrb, result, "\0");
+  s = mrb_str_cat_lit(mrb, result, "\0");
   printf("$%lu = %s\n", (unsigned long)mrdb->print_no++, RSTRING_PTR(s));
 
   if (mrdb->print_no == 0) {