remove trailing spaces

src/mruby_core.rake

@@ -2,7 +2,7 @@ MRuby.each_target do
   current_dir = File.dirname(__FILE__).relative_path_from(Dir.pwd)
   relative_from_root = File.dirname(__FILE__).relative_path_from(MRUBY_ROOT)
   current_build_dir = "#{build_dir}/#{relative_from_root}"
-  
+
   lex_def = "#{current_dir}/lex.def"
   objs = Dir.glob("#{current_dir}/*.c").map { |f|
     next nil if cxx_abi_enabled? and f =~ /(codegen|error|vm).c$/

src/numeric.c

@@ -150,7 +150,7 @@ mrb_flo_to_str(mrb_state *mrb, mrb_float flo)
     else {
       exp = 0;
     }
-    
+
     /* preserve significands */
     if (exp < 0) {
       int i, beg = -1, end = 0;

src/print.c

@@ -38,7 +38,7 @@ mrb_print_error(mrb_state *mrb)
 {
 #ifdef ENABLE_STDIO
   mrb_value s;
-  
+
   mrb_print_backtrace(mrb);
   s = mrb_funcall(mrb, mrb_obj_value(mrb->exc), "inspect", 0);
   if (mrb_string_p(s)) {