fix typo

main-command/src/main/scala/sbt/internal/ui/UITask.scala

@@ -75,7 +75,7 @@ private[sbt] object UITask {
                 this.synchronized(this.wait())
                 Right("") // should be unreachable
               // JLine returns null on ctrl+d when there is no other input. This interprets
-              // ctrl+d with no imput as an exit
+              // ctrl+d with no input as an exit
               case None => Left(TerminateAction)
               case Some(s: String) =>
                 s.trim() match {

main/src/main/scala/sbt/BackgroundJobService.scala

@@ -44,7 +44,7 @@ abstract class BackgroundJobService extends Closeable {
     start(logger, file)._2.apply()
   }
 
-  /** Same as shutown. */
+  /** Same as shutdown. */
   def close(): Unit
 
   /** Shuts down all background jobs. */

main/src/main/scala/sbt/Defaults.scala

@@ -4387,7 +4387,7 @@ trait BuildExtra extends BuildCommon with DefExtra {
   }
 
   @deprecated(
-    "externalIvyFile is not supported by Couriser, and will be removed in the future",
+    "externalIvyFile is not supported by Coursier, and will be removed in the future",
     since = "1.5.0"
   )
   def externalIvyFile(

main/src/main/scala/sbt/UpperStateOps.scala

@@ -18,12 +18,12 @@ trait UpperStateOps extends Any {
 
   /**
    * ProjectRef to the current project of the state session that can be change using
-   * `project` commmand.
+   * `project` command.
    */
   def currentRef: ProjectRef
 
   /**
-   * Current project of the state session that can be change using `project` commmand.
+   * Current project of the state session that can be change using `project` command.
    */
   def currentProject: ResolvedProject
 

main/src/main/scala/sbt/nio/Settings.scala

@@ -259,7 +259,7 @@ private[sbt] object Settings {
    * Provides an automatically generated clean method for a task that provides fileOutputs.
    *
    * @param taskKey the task for which we add a custom clean implementation
-   * @return a task specificic clean implementation
+   * @return a task specific clean implementation
    */
   @nowarn
   private[sbt] def cleanImpl[T: JsonFormat: ToSeqPath](taskKey: TaskKey[T]): Def.Setting[_] = {