[dedupe] for near-dupe hashing, remove whitespace from root expansions so something like "Ocean Walk Dr" and "Oceanwalk Dr" will have a chance of matching downstream

src/string_utils.h

@@ -122,6 +122,9 @@ ssize_t string_next_period(char *str);
 bool string_contains_period_len(char *str, size_t len);
 bool string_contains_period(char *str);
 
+ssize_t string_next_whitespace_len(char *str, size_t len);
+ssize_t string_next_whitespace(char *str);
+
 size_t string_left_spaces_len(char *str, size_t len);
 size_t string_right_spaces_len(char *str, size_t len);
 char *string_trim(char *str);