some basic changes to try to fix for the -Wpedantic flag

src/std/config.c

@@ -583,7 +583,7 @@ void ARC_Config_CreateGroup(ARC_Config *config, ARC_String *name){
 
 void ARC_Config_DestroyGroup(ARC_HashtableNode *group, void *userdata){
     free((char *)group->key);
-    return ARC_Hashtable_Destroy((ARC_Hashtable *)group->data, ARC_Config_DestroyGroupNode, userdata);
+    ARC_Hashtable_Destroy((ARC_Hashtable *)group->data, ARC_Config_DestroyGroupNode, userdata);
 }
 
 void ARC_Config_DestroyGroupNode(ARC_HashtableNode *node, void *userdata){
@@ -609,4 +609,4 @@ void ARC_Config_RemoveKey(ARC_HashtableNode *node, void *userdata){
     }
 
     free((ARC_ConfigKey *)node->data);
-}
+}

src/std/hashtable.c

@@ -28,7 +28,7 @@ void CRC32(void *key, size_t *keysize, uint32_t *hashval){
 }
 
 int8_t ARC_Default_Key_Compare(void *key1, size_t *key1size, void *key2, size_t *key2size){
-    return key1 - key2;
+    return key1 == key2;
 }
 
 void ARC_HashtableNode_Create(ARC_HashtableNode **node, void *key, size_t *keysize, void *data){

src/std/string.c

@@ -69,6 +69,22 @@ void ARC_String_CopySubstring(ARC_String **substring, ARC_String *original, uint
     ARC_String_Create(substring, data, length);
 }
 
+void ARC_String_ReplaceWithSubstring(ARC_String **string, uint64_t start, uint64_t length){
+    ARC_String *substring;
+    ARC_String_CopySubstring(&substring, *string, start, length);
+
+    //if error or substring is null free memory and return
+    if(arc_errno || substring == NULL){
+        if(substring != NULL){
+            free(substring);
+        }
+        return;
+    }
+
+    free(*string);
+    *string = substring;
+}
+
 void ARC_String_RemoveSubstring(ARC_String **newString, ARC_String *original, ARC_String *substring){
     uint64_t index = ARC_String_Find(original, substring);
     if(arc_errno){