[String] Use .equals for flash strings instead of == #4224
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SDK 3.0.2 does have a serious issue with String assignment
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Extending the
operator ==in esp8266/Arduino WString for flash strings does reduce bin size.However this change was already removed before.
See: esp8266/Arduino#8663 (comment)
Therefore it is best to replace
== F("...")with.equals(F("..."))in our code.N.B. this may only reduce bin size on SDK 3.0.x builds as there was no .equals for flash strings in SDK 2.7.4