Fix many typos in docs and comments

This commit corrects many typos found in scaladocs, comments and
documentation. It should reduce a bit number of PRs which fix one
typo.

There are no changes in the 'real' code except one corrected name of
a JUnit test method and some error messages in exceptions. In the case
of typos in other method or field names etc., I just skipped them.

Obviously this commit doesn't fix all existing typos. I just generated
in IntelliJ the list of potential typos and looked through it quickly.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/concurrent/Future.scala b/src/library/scala/concurrent/Future.scala
index e93a3284dc..914646320c 100644
--- a/src/library/scala/concurrent/Future.scala
+++ b/src/library/scala/concurrent/Future.scala
@@ -485,7 +485,7 @@ object Future {
   *  The result becomes available once the asynchronous computation is completed.
   *
   *  @tparam T       the type of the result
-  *  @param body     the asychronous computation
+  *  @param body     the asynchronous computation
   *  @param executor  the execution context on which the future is run
   *  @return         the `Future` holding the result of the computation
   */