Use t instead of value to allow for IDE naming

[Jawnnypoo]

Naming the value t instead of value allows the IntelliJ to intelligently name the variable based on the type when autocompleting.

Before:

Single.just(new Dog()).subscribe(new SingleObserver<String>() {
            @Override
            public void onSubscribe(Disposable d) {
                
            }

            @Override
            public void onSuccess(Dog value) {

            }

            @Override
            public void onError(Throwable e) {

            }
        });

After:

Single.just(new Dog()).subscribe(new SingleObserver<String>() {
            @Override
            public void onSubscribe(Disposable d) {

            }

            @Override
            public void onSuccess(Dog dog) {

            }

            @Override
            public void onError(Throwable e) {

            }
        });

[JakeWharton]

Awesome. Does 2.x need this?

[Jawnnypoo]

This is for 2.X. Did I make a mistake? I could add this to 1.X also if desired.

[JakeWharton]

Hah, yeah I meant 1.x. Off-by-one error.

[Jawnnypoo]

#4908 Surprisingly it was already done a lot more in 1.x, so there were only a few cases I found.

[codecov-io]

Current coverage is 95.70% (diff: 100%)

Merging #4907 into 2.x will increase coverage by 0.02%

@@                2.x      #4907   diff @@
==========================================
  Files           586        586          
  Lines         37410      37410          
  Methods           0          0          
  Messages          0          0          
  Branches       5628       5628          
==========================================
+ Hits          35792      35803    +11   
+ Misses          673        665     -8   
+ Partials        945        942     -3   

Powered by Codecov. Last update 9f24df9...d6ee834