fix equal? on cycles #302

CHANGELOG.md

@@ -68,6 +68,7 @@
 * fix let with duplicated variables [#335](https://github.com/jcubic/lips/issues/335)
 * fix escape ellipsis in syntax-rules [#334](https://github.com/jcubic/lips/issues/334)
 * fix parsing inexact complex without real part and `inexact->exact` procedure [#340](https://github.com/jcubic/lips/issues/340)
+* fix `equal?` on cycles [#302](https://github.com/jcubic/lips/issues/302)
 
 ## 1.0.0-beta.18
 ### Breaking

README.md

@@ -7,7 +7,7 @@
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