[normalize] adding an option for string trimming in normalize

src/normalize.c

@@ -11,6 +11,10 @@ char *normalize_string_utf8(char *str, uint64_t options) {
 
     bool have_utf8proc_options = false;
 
+    if (options & NORMALIZE_STRING_TRIM) {
+        string_trim(str);
+    }
+
     if (options & NORMALIZE_STRING_DECOMPOSE) {
         have_utf8proc_options = true;
         utf8proc_options |= UTF8PROC_OPTIONS_NFD;

src/normalize.h

@@ -44,6 +44,7 @@ extern "C" {
 #define NORMALIZE_STRING_STRIP_ACCENTS 1 << 2
 #define NORMALIZE_STRING_DECOMPOSE 1 << 3
 #define NORMALIZE_STRING_LOWERCASE 1 << 4
+#define NORMALIZE_STRING_TRIM 1 << 5
 
 #define NORMALIZE_TOKEN_REPLACE_HYPHENS 1 << 0
 #define NORMALIZE_TOKEN_DELETE_HYPHENS 1 << 1