improve readability of string: fix indentation and remove trailing spaces

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
diff --git a/libc/string/strstr.c b/libc/string/strstr.c
index debe96c..95a865b 100644
--- a/libc/string/strstr.c
+++ b/libc/string/strstr.c
@@ -51,6 +51,6 @@
 			} while (sc != c);
 		} while (strncmp(s, find, len) != 0);
 		s--;
-    }
+	}
 	return ((char *)s);
 }