NIS to IPA user migration script (nis-users.sh) adds incorrect value for GECOS field in user's LDAP entry

Issue

• NIS to IPA user migration script nis-users.sh adds incorrect value for GECOS field in user's LDAP entry in IPA:

[root@ipaserver-rh8 ~]# cat /tmp/nis-map.passwd 
nisuser:x:10001:10002:NIS User Test:/home/nisuser:/bin/bash  <---- 

[root@ipaserver-rh8 ~]# sh  /root/nis-users.sh
--------------------
Added user "nisuser"
--------------------
  User login: nisuser
  First name: NIS
  Last name: USER
  Full name: NIS USER
  Display name: NIS USER
  Initials: NU
  Home directory: /home/nisuser
  GECOS: $gecos  <---- Actual value is not added
  Login shell: /bin/bash
  Principal name: nisuser@EXAMPLE.LOCAL
  Principal alias: nisuser@EXAMPLE.LOCAL
  User password expiration: 20230203062845Z
  Email address: nisuser@example.local
  UID: 10001
  GID: 10002
  Password: True
  Member of groups: ipausers
  Kerberos keys available: True
  User login: nisuser
  First name: NIS
  Last name: USER
  Home directory: /home/nisuser
  Login shell: /bin/bash
  Principal name: nisuser@EXAMPLE.LOCAL
  Principal alias: nisuser@EXAMPLE.LOCAL
  Email address: nisuser@example.local
  UID: 10001
  GID: 10002
  Account disabled: False
  Password: True
  Member of groups: ipausers
  Kerberos keys available: True