Merge pull request #2894 from suzukaze/fix-docs

Fix indents; Indent is two spaces; Delete tabs [skip ci]

doc/api/mruby/array.h.md

@@ -12,7 +12,6 @@ In this example we read from a Ruby file inside C. The Ruby code will print what
 #include "mruby/array.h" // Needs the array header.
 #include "mruby/compile.h"
 
-
 int main(int argc, char *argv[])
 {
   mrb_value new_ary; // Declare variable.

doc/api/mruby/hash.h.md

@@ -17,7 +17,6 @@ to Hash.new.
 #include "mruby/hash.h" // Needs the hash header.
 #include "mruby/compile.h"
 
-
 int main(int argc, char *argv[])
 {
   mrb_state *mrb = mrb_open();
@@ -67,7 +66,6 @@ a = {:da_key => 80}
 #include "mruby/hash.h" // Needs the hash header.
 #include "mruby/compile.h"
 
-
 int main(int argc, char *argv[])
 {
   mrb_state *mrb = mrb_open();
@@ -205,6 +203,7 @@ int main(int argc, char *argv[])
   mrb_value get_hash_value; // Declare variable for getting a value from a hash.
   mrb_sym hash_key_a = mrb_intern_cstr(mrb, "da_key1"); // Declare a symbol.   
   mrb_sym hash_key_b = mrb_intern_cstr(mrb, "da_key2"); // Declare a symbol.
+  mrb_sym hash_key_b = mrb_intern_cstr(mrb, "da_key2"); // Declare a symbol.
   mrb_int hash_value_a = 80; // Declare a fixnum value.
   mrb_int hash_value_b = 90; // Declare a fixnum value.
   FILE *fp = fopen("test_ext.rb","r");