Add trimming to the contract functions inputs

[nikitosing]

Close #4709

Changelog

Bug Fixes

• Added trimming to the contract functions inputs
• Fixed bug descirbed in issue
• Added test for prepareMethodArgs function

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
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[vbaranov]

@nikitosing I suggest refactor and cleanup implementation. We already have replaceSpaces function before. Could you elaborate on why it didn't work, as expected? I guess we created this function specifically for this issue, we trying to resolve. And let's place trimming logic into a single function? Also, could we add tests for this issues since it appears the second time?