This fixes the following type error that is thrown when calling getAllAngularTestability() while running Dartium in checked mode:

type 'MappedListIterable' is not a subtype of type 'List<PublicTestability>' of 'publicTestabilities'.
#0      GetTestability.addToWindow.<anonymous closure> (package:angular2/src/core/testability/get_testability.dart:92:12)
#1      Function._apply (dart:core-patch/function_patch.dart:7)
angular#2      Function.apply (dart:core-patch/function_patch.dart:28)
angular#3      __invokeFn (package:angular2/src/core/testability/get_testability.dart:26:26)
angular#4      _jsFunction.<anonymous closure> (package:angular2/src/core/testability/get_testability.dart:15:12)

# This is the 1st commit message:

fix(common): inconsistency on TitleCasePipe

TitleCasePipe was not behaving as expected with non-ascii characters.

# This is the commit message angular#2:

refactor(common): lint errors

# This is the commit message angular#3:

feat(common): more tests for TitleCasePipe

Copied tests from angular#20123, just to make sure fix covers all needs.

# This is the commit message angular#4:

refactor(common): fix linting errors

# This is the 1st commit message:

docs: add api doc to commonly queried elements

# The commit message angular#2 will be skipped:

# fixup! docs: add api doc to commonly queried elements

# The commit message angular#3 will be skipped:

# fixup! docs: add api doc to commonly queried elements

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import angular#2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import angular#2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import angular#2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import #2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

PR Close #27470

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import angular#2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

PR Close angular#27470

Previously the ngfactory shim generator in ngtsc would always write two
imports in the factory file shims:

1) an import to @angular/core
2) an import to the base file

If the base file has no exports, import angular#2 would be empty. This turns out
to cause issues downstream.

This commit changes the generated shim so if there are no exports in the
base file, the generated shim is empty too.

PR Close angular#27470