Many sniffs were disabled in a57b9fb (#4057).

We should eventually restore them, and then clean up affected files. When we restore them, it would be helpful to only restore one sniff per pull request to make the file churn easily understandable.

• Generic.ControlStructures.InlineControlStructure.NotAllowed
• Generic.Formatting.DisallowMultipleStatements.SameLine
• Generic.Formatting.SpaceAfterCast.NoSpace
• Generic.Functions.OpeningFunctionBraceKernighanRitchie.ContentAfterBrace
• Generic.Functions.OpeningFunctionBraceKernighanRitchie.SpaceBeforeBrace
• Generic.PHP.LowerCaseKeyword.Found
• Generic.PHP.LowerCaseConstant.Found
• Generic.PHP.NoSilencedErrors.Discouraged
• Generic.WhiteSpace.DisallowSpaceIndent.SpacesUsed
• Generic.WhiteSpace.ScopeIndent.Incorrect
• Generic.WhiteSpace.ScopeIndent.IncorrectExact
• PEAR.Functions.FunctionCallSignature.Indent
• PEAR.Functions.FunctionCallSignature.EmptyLine
• PEAR.Functions.FunctionCallSignature.SpaceAfterOpenBracket
• PEAR.Functions.FunctionCallSignature.SpaceBeforeCloseBracket
• PEAR.Functions.FunctionCallSignature.SpaceBeforeOpenBracket
• PSR2.ControlStructures.ElseIfDeclaration.NotAllowed
• Squiz.Strings.ConcatenationSpacing.PaddingFound
• Squiz.ControlStructures.ControlSignature.SpaceAfterKeyword
• Squiz.ControlStructures.ControlSignature.SpaceAfterCloseParenthesis
• Squiz.Commenting.LongConditionClosingComment.Missing
• Squiz.Functions.FunctionDeclarationArgumentSpacing.SpacingAfterOpen
• Squiz.PHP.DisallowMultipleAssignments.Found
• Squiz.Strings.DoubleQuoteUsage.NotRequired
• Squiz.WhiteSpace.SuperfluousWhitespace.EndLine
• WordPress.Arrays.ArrayDeclaration.NotLowerCase
• WordPress.Arrays.ArrayDeclaration.NoComma
• WordPress.Arrays.ArrayDeclaration.NoCommaAfterLast
• WordPress.Arrays.ArrayDeclaration.SpaceAfterKeyword
• WordPress.Arrays.ArrayDeclarationSpacing.AssociativeKeyFound
• WordPress.Arrays.ArrayDeclarationSpacing.NoSpaceAfterArrayOpener
• WordPress.Arrays.ArrayDeclarationSpacing.NoSpaceBeforeArrayCloser
• WordPress.Arrays.ArrayKeySpacingRestrictions.SpacesAroundArrayKeys
• WordPress.Arrays.ArrayKeySpacingRestrictions.NoSpacesAroundArrayKeys
• WordPress.DB.RestrictedFunctions.mysql_mysql_host_to_cli_args
• WordPress.Files.FileName.InvalidClassFileName
• WordPress.Files.FileName.NotHyphenatedLowercase
• WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
• WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
• WordPress.NamingConventions.ValidVariableName.NotSnakeCaseMemberVar
• WordPress.NamingConventions.ValidVariableName.MemberNotSnakeCase
• WordPress.NamingConventions.ValidVariableName.NotSnakeCase
• WordPress.PHP.YodaConditions.NotYoda
• WordPress.WhiteSpace.CastStructureSpacing.NoSpaceBeforeOpenParenthesis
• WordPress.WhiteSpace.CastStructureSpacing.NoSpaceAfterCloseParenthesis
• WordPress.WhiteSpace.ControlStructureSpacing.BlankLineAfterEnd
• WordPress.WhiteSpace.ControlStructureSpacing.NoSpaceAfterStructureOpen
• WordPress.WhiteSpace.ControlStructureSpacing.NoSpaceAfterOpenParenthesis
• WordPress.WhiteSpace.ControlStructureSpacing.NoSpaceBeforeOpenParenthesis
• WordPress.WhiteSpace.ControlStructureSpacing.NoSpaceAfterCloseParenthesis
• WordPress.WhiteSpace.ControlStructureSpacing.NoSpaceBeforeCloseParenthesis
• WordPress.WhiteSpace.ControlStructureSpacing.ExtraSpaceAfterOpenParenthesis
• WordPress.WhiteSpace.OperatorSpacing.NoSpaceAfter
• WordPress.WhiteSpace.OperatorSpacing.NoSpaceBefore