@ngdoc error
@name $interpolate:reqopenbrace
@fullName An opening brace was expected but not found
@description

The plural or select extension keyword or values (such as "other", "male",
"female", "=0", "one", "many", etc.) MUST be followed by a message enclosed in
braces.

For more information about the MessageFormat syntax in interpolation
expressions, please refer to MessageFormat extensions section at
{@link guide/i18n#MessageFormat Angular i18n MessageFormat}
