rubocop/rubocop-ast#345 and rubocop/rubocop-ast#346 add new methods for simplifying node location lookups. This internal affairs cop applies those new methods.

# bad
node.loc.respond_to?(:begin) && node.loc.begin

# good
node.loc?(:begin)

# bad
node.loc.respond_to?(:begin) && node.loc.begin.is?('(')

# good
node.loc_is?(:begin, '(')

# bad
node.loc.respond_to?(:begin) && node.loc.begin.source == '('

# good
node.loc_is?(:begin, '(')

Before submitting the PR make sure the following are checked:

• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
• Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.