Fix for consistency across document (Bash functions)

[marcelozarate]

What type of PR is this? (check all applicable)

• [x] ♻️ Refactor
• [ ] ✨ Feature
• [ ] 🐛 Bug Fix
• [ ] 👷 Optimization
• [x] 📝 Documentation Update
• [ ] 🚩 Other

Description

In most of functions declarations across the book, a space before the opening bracket is used. A small change open to review. Feel free to close it if its not relevant @bobbyiliev

Related Tickets & Documents

Added to documentation?

• [ ] 📜 readme
• [x] 🙅 no documentation needed

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