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/strcasecmp.c b/libc/string/strcasecmp.c
index 12f3a09..2be0913 100644
--- a/libc/string/strcasecmp.c
+++ b/libc/string/strcasecmp.c
@@ -98,8 +98,8 @@
 			if (cm[*us1] != cm[*us2++])
 				return (cm[*us1] - cm[*--us2]);
 			if (*us1++ == '\0')
-      break;
+				break;
 		} while (--n != 0);
-  }
+	}
 	return (0);
 }