Fix PHP Notice in Squiz.WhiteSpace.ScopeKeywordSpacing

[fredden]

Description

While looking into #152, I ran the following command:
phpcbf -p . --standard=PSR2 --ignore="*/build/*,*/vendor/*" --basepath=. --extensions=inc --suffix=.conflictcheck

Instead of a useful report, I got a PHP Fatal error:

FFFFFFFFFEFFFFFF..EFFF.FPHP Fatal error:  Uncaught PHP_CodeSniffer\Exceptions\RuntimeException: Undefined array key 895 in .../src/Standards/Squiz/Sniffs/WhiteSpace/ScopeKeywordSpacingSniff.php on line 131 in .../src/Runner.php:608
Stack trace:
#0 .../src/Standards/Squiz/Sniffs/WhiteSpace/ScopeKeywordSpacingSniff.php(131): PHP_CodeSniffer\Runner->handleErrors()
#1 .../src/Files/File.php(518): PHP_CodeSniffer\Standards\Squiz\Sniffs\WhiteSpace\ScopeKeywordSpacingSniff->process()
#2 .../src/Files/LocalFile.php(92): PHP_CodeSniffer\Files\File->process()
#3 .../src/Fixer.php(174): PHP_CodeSniffer\Files\LocalFile->process()
#4 .../src/Reports/Cbf.php(52): PHP_CodeSniffer\Fixer->fixFile()
#5 .../src/Reporter.php(285): PHP_CodeSniffer\Reports\Cbf->generateFileReport()
#6 .../src/Runner.php(691): PHP_CodeSniffer\Reporter->cacheFileReport()
#7 .../src/Runner.php(438): PHP_CodeSniffer\Runner->processFile()
#8 .../src/Runner.php(204): PHP_CodeSniffer\Runner->run()
#9 .../bin/phpcbf(18): PHP_CodeSniffer\Runner->runPHPCBF()
#10 {main}
  thrown in .../src/Runner.php on line 608

This pull request fixes this error, allowing the suggested command to produce a report.
I'm not adding any specific tests for this, as the integration test that will eventually be added as part of #152 will cover this case.

Suggested changelog entry

Related issues/external references

Related to #152

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
  • This change is only breaking for integrators, not for external standards or end-users.
• Documentation improvement

PR checklist

• I have checked there is no other PR open for the same change.
• I have read the Contribution Guidelines.
• I grant the project the right to include and distribute the code under the BSD-3-Clause license (and I have the right to grant these rights).
• I have added tests to cover my changes.
• I have verified that the code complies with the projects coding standards.
• [Required for new sniffs] I have added XML documentation for the sniff.

[jrfnl]

This looks like a duplicate of #150 which fixes this more comprehensively.... ?

[fredden]

Yes, #150 does look like a duplicate of this. I did look through the list of open pull requests when opening this, but didn't notice #150 at the time. I don't know why, as its title includes (most of) this sniff's name.