don't continue on empty strings

src/main.c

@@ -48,14 +48,25 @@ int main(int argc, char *argv[]) {
   init_tables(elements, inv, polls, 1);
 
   printf("%s, welcome to Elemental on Command Line!\n", name);
+  int newline = 1;
   while (1) {
     // todo: separate into functions
 
-    printf("\n");
+    if (newline) {
+
+      printf("\n");
+    }
     fgets(command, MAX_BUF_LENGTH - 1, stdin);
 
     int cl = strlen(command);
 
+    if (cl < 2) {
+      newline = 0;
+      continue;
+    } else {
+      newline = 1;
+    }
+
     for (int i = 0; i < cl - 1; i++) {
       command[i] = tolower(command[i]);
     }