message: docs(operators): Fix typo in Operators guide documentation.
diff: @@ -8,7 +8,7 @@ Operators are **functions**. There are two kinds of operators:
  <span class="informal">A Pipeable Operator is a function that takes an Observable as its input and returns another Observable. It is a pure operation: the previous Observable stays unmodified.</span>
  -An Pipeable Operator is essentially a pure function which takes one Observable as input and generates another Observable as output. Subscribing to the output Observable will also subscribe to the input Observable.
  +A Pipeable Operator is essentially a pure function which takes one Observable as input and generates another Observable as output. Subscribing to the output Observable will also subscribe to the input Observable.
  **Creation Operators** are the other kind of operator, which can be called as standalone functions to create a new Observable. For example: `of(1, 2, 3)` creates an observable that will emit 1, 2, and 3, one right after another. Creation operators will be discussed in more detail in a later section.
  