Modify ignore_empty output

Author: Fu-Jie

AUTHORS.md

@@ -109,3 +109,4 @@ Contributors
 - [@ethompsy](https://github.com/ethompsy) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/issues?q=is%3Aclosed+mentions%3Aethompsy)
 - [@apatao](https://github.com/apatao) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/issues?q=is%3Aclosed+mentions%3Aapatao)
 - [@OdinTech3](https://github.com/OdinTech3) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/pull/1094)
+- [@Fu-Jie](https://github.com/Fu-Jie) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/issues/1164)

CHANGELOG.md

@@ -21,6 +21,7 @@
 -   [ENH] Enable `encode_categorical` handle 2 (or more ) dimensions array. PR #1153 @Zeroto521
 -   [ENH] Faster computation for a single non-equi join, with a numba engine. Issue #1102 @samukweku
 -   [INF] Cancel old workflow runs via Github Action `concurrency`. PR #1161 @Zeroto521
+-   [BUG] Modify ignore_empty output in `concatenate_columns`. PR #1164 @Fu-Jie
 
 ## [v0.23.1] - 2022-05-03