Update README.md

README.md

@@ -88,10 +88,10 @@ Linux or macOS users might follow the following instructions if they have a rece
     ```
  2. Create a new file named `demo.c` with this content:
     ```C
-        #include <stdio.h>
-        #include <stdlib.h>
-        #include "roaring.c"
-        int main() {
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include "roaring.c"
+    int main() {
         roaring_bitmap_t *r1 = roaring_bitmap_create();
         for (uint32_t i = 100; i < 1000; i++) roaring_bitmap_add(r1, i);
         printf("cardinality = %d\n", (int) roaring_bitmap_get_cardinality(r1));
@@ -104,14 +104,14 @@ Linux or macOS users might follow the following instructions if they have a rece
         printf("%zu \n", bitset_count(b));
         bitset_free(b);
         return EXIT_SUCCESS;
-        }
+    }
     ```
  2. Create a new file named `demo.cpp` with this content:
     ```C++
-        #include <iostream>
-        #include "roaring.hh"
-        #include "roaring.c"
-        int main() {
+    #include <iostream>
+    #include "roaring.hh"
+    #include "roaring.c"
+    int main() {
         roaring::Roaring r1;
         for (uint32_t i = 100; i < 1000; i++) {
             r1.add(i);
@@ -124,7 +124,7 @@ Linux or macOS users might follow the following instructions if they have a rece
         }
         std::cout << "cardinality = " << r2.cardinality() << std::endl;
         return 0;
-        }
+    }
     ```
  2. Compile
     ```