built-ins/Generator*: make all indentation consistent (depth & character) (#1441)

test/built-ins/GeneratorFunction/extensibility.js

test/built-ins/GeneratorFunction/has-instance.js

.../built-ins/GeneratorFunction/instance-construct-throws.js

test/built-ins/GeneratorFunction/instance-length.js

test/built-ins/GeneratorFunction/instance-name.js

test/built-ins/GeneratorFunction/instance-prototype.js

...ilt-ins/GeneratorFunction/instance-yield-expr-in-param.js

.../GeneratorFunction/invoked-as-constructor-no-arguments.js

...neratorFunction/invoked-as-function-multiple-arguments.js

...ins/GeneratorFunction/invoked-as-function-no-arguments.js

.../GeneratorFunction/invoked-as-function-single-argument.js

test/built-ins/GeneratorFunction/length.js

test/built-ins/GeneratorFunction/name.js

test/built-ins/GeneratorFunction/proto-from-ctor-realm.js

test/built-ins/GeneratorFunction/prototype/constructor.js

test/built-ins/GeneratorFunction/prototype/extensibility.js

test/built-ins/GeneratorFunction/prototype/prop-desc.js

test/built-ins/GeneratorPrototype/next/consecutive-yields.js

...-ins/GeneratorPrototype/next/context-method-invocation.js

...built-ins/GeneratorPrototype/next/from-state-executing.js