Add useful context to comment in hashmap_do_init()

src/util/bsearch.h

@@ -76,7 +76,7 @@ static inline ssize_t bisearch_idx (
 }
 
 // This is a wrapper around strcmp(3) with void* parameters, suitable
-// for use with bsearch(3) without the need for casting
+// for use in bsearch(3) without the need for casting
 static inline int vstrcmp(const void *a, const void *b)
 {
     return strcmp(a, b);

src/util/hashmap.c

@@ -65,7 +65,8 @@ static int hashmap_do_init(HashMap *map, size_t size)
 
     // Round up the size to the next power of 2, to allow using simple
     // bitwise ops (instead of modulo) to wrap the hash value and also
-    // to allow quadratic probing with triangular numbers
+    // to allow quadratic probing with triangular numbers (`i += j++`
+    // in the `for` loops below)
     size = next_pow2(size);
     if (unlikely(size == 0)) {
         return EOVERFLOW;