implemented trimRight

src/userinput.c

@@ -12,4 +12,13 @@ void trimLeft(char *input) {
     for (int i = 0; i <= length - firstIndex; i++) {
         input[i] = input[firstIndex + i];
     }
+}
+
+void trimRight(char *input) {
+    size_t length = strlen(input);
+    int index = length - 1;
+    while (index >= 0 && isspace(input[index])) {
+        input[index] = '\0';
+        index--;
+    }
 }