i18n's ph value doesn't allow single quotes, only double quotes

[robertorfischer]

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[ ] feature request
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Current behavior

<span i18n="description">begin message {{param // i18n(ph = "name")}} end</span>

In i18n's ph value, only double quotes are allowed. Single quotes are not and the placeholder is ignored.

Expected behavior

Expected to be able to use single quotes too.

Minimal reproduction of the problem with instructions

• Angular version: 4.0.0-rc.5

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