ckeditor - CKEdtior less than sign (<) is not shown after saving -

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i using redmine installation ckeditor plugin. started document our work in wiki. 1 problem commands not shown correctly after saving.

for example, write:

mysql -u root -p bitnami_redmine < backup.sql

but after saving page, less-than sign , after gone: 

mysql -u root -p bitnami_redmine

what can correct behavior?


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