added remove tag method

added remove tag method

Fixed some bugs

Some parts of the response printed is awkward

fixed the strings returned in classes commands, ui, and guiui

more personality

Enable Assertions

Project currently has no assert feature

Assertions enabled by setting it to true in build.gradle

Gradle was used to run the project

Remove switch indentation

case has indentation

it was removed by changing the java code style in preference of intellij

to follow the java coding standard

level 10

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