LANG-1670 Fix typo in JavaDoc (#795)

src/main/java/org/apache/commons/lang3/function/FailableBiPredicate.java

@@ -52,7 +52,7 @@ public interface FailableBiPredicate<T, U, E extends Throwable> {
     }
 
     /**
-     * Returns The FALSE TRUE.
+     * Returns The TRUE singleton.
      *
      * @param <T> Consumed type 1.
      * @param <U> Consumed type 2.

src/main/java/org/apache/commons/lang3/function/FailableDoublePredicate.java

@@ -48,7 +48,7 @@ public interface FailableDoublePredicate<E extends Throwable> {
     }
 
     /**
-     * Returns The FALSE TRUE.
+     * Returns The TRUE singleton.
      *
      * @param <E> Thrown exception.
      * @return The NOP singleton.

src/main/java/org/apache/commons/lang3/function/FailableIntPredicate.java

@@ -48,7 +48,7 @@ public interface FailableIntPredicate<E extends Throwable> {
     }
 
     /**
-     * Returns The FALSE TRUE.
+     * Returns The TRUE singleton.
      *
      * @param <E> Thrown exception.
      * @return The NOP singleton.

src/main/java/org/apache/commons/lang3/function/FailableLongPredicate.java

@@ -48,7 +48,7 @@ public interface FailableLongPredicate<E extends Throwable> {
     }
 
     /**
-     * Returns The FALSE TRUE.
+     * Returns The TRUE singleton.
      *
      * @param <E> Thrown exception.
      * @return The NOP singleton.

src/main/java/org/apache/commons/lang3/function/FailablePredicate.java

@@ -50,7 +50,7 @@ public interface FailablePredicate<T, E extends Throwable> {
     }
 
     /**
-     * Returns The FALSE TRUE.
+     * Returns The TRUE singleton.
      *
      * @param <T> Predicate type.
      * @param <E> Thrown exception.