Fix duplicate word in comments (#20359)

compiler/src/dotty/tools/dotc/ast/tpd.scala

@@ -1274,7 +1274,7 @@ object tpd extends Trees.Instance[Type] with TypedTreeInfo {
       !(sym.is(Method) && sym.info.isInstanceOf[MethodOrPoly]) // if is a method it is parameterless
   }
 
-  /** A tree traverser that generates the the same import contexts as original typer for statements.
+  /** A tree traverser that generates the same import contexts as original typer for statements.
    *  TODO: Should we align TreeMapWithPreciseStatContexts and also keep track of exprOwners?
    */
   abstract class TreeTraverserWithPreciseImportContexts extends TreeTraverser:

compiler/src/dotty/tools/dotc/transform/CheckUnused.scala

@@ -624,7 +624,7 @@ object CheckUnused:
       symbol.name.mangledString.contains("$")
 
     /**
-     * Is the the constructor of synthetic package object
+     * Is the constructor of synthetic package object
      * Should be ignored as it is always imported/used in package
      * Trigger false negative on used import
      *

compiler/src/dotty/tools/dotc/typer/Synthesizer.scala

@@ -536,7 +536,7 @@ class Synthesizer(typer: Typer)(using @constructorOnly c: Context):
           else
             refineAtPrefix(childPre, childClass, childClass.primaryConstructor.info) match
               case info: PolyType =>
-                // Compute the the full child type by solving the subtype constraint
+                // Compute the full child type by solving the subtype constraint
                 // `C[X1, ..., Xn] <: P`, where
                 //
                 //   - P is the current `mirroredType`

compiler/src/scala/quoted/runtime/impl/QuoteMatcher.scala

@@ -26,7 +26,7 @@ import dotty.tools.dotc.util.optional
  *   - `isClosedUnder(x1, .., xn)('{e})` returns true if and only if all the references in `e` to names defined in the pattern are contained in the set `{x1, ... xn}`.
  *   - `lift(x1, .., xn)('{e})` returns `(y1, ..., yn) => [xi = $yi]'{e}` where `yi` is an `Expr` of the type of `xi`.
  *   - `withEnv(x1 -> y1, ..., xn -> yn)(matching)` evaluates matching recording that `xi` is equivalent to `yi`.
- *   - `matched` denotes that the the match succeeded and `matched('{e})` denotes that a match succeeded and extracts `'{e}`
+ *   - `matched` denotes that the match succeeded and `matched('{e})` denotes that a match succeeded and extracts `'{e}`
  *   - `&&&` matches if both sides match. Concatenates the extracted expressions of both sides.
  *
  *   Note: that not all quoted terms bellow are valid expressions

compiler/test/dotty/tools/scripting/BashExitCodeTests.scala

@@ -28,7 +28,7 @@ class BashExitCodeTests:
         s"expected $expectedExitCode but got $exitCode${pp("out", stdout)}${pp("err", stderr)}"
       }, expectedExitCode, exitCode)
 
-  // Helpers for running scala, scalac, and scalac without the the output directory ("raw")
+  // Helpers for running scala, scalac, and scalac without the output directory ("raw")
   def scala(args: String*)     = verifyExit(scalaPath, args*)
   def scalacRaw(args: String*) = verifyExit(scalacPath, args*)
   def scalac(args: String*)    = scalacRaw(("-d" +: tmpDir +: args)*)

scala2-library-cc/src/scala/collection/mutable/ArrayBuffer.scala

@@ -197,7 +197,7 @@ class ArrayBuffer[A] private (initialElements: Array[AnyRef], initialSize: Int)
           //     the previous line
           //   - `copyElemsToArray` will call `System.arraycopy`
           //   - `System.arraycopy` will effectively "read" all the values before
-          //     overwriting any of them when two arrays are the the same reference
+          //     overwriting any of them when two arrays are the same reference
           val actual = IterableOnce.copyElemsToArray(elems, array.asInstanceOf[Array[Any]], index, elemsLength)
           if (actual != elemsLength) throw new IllegalStateException(s"Copied $actual of $elemsLength")
           size0 = len + elemsLength // update size AFTER the copy, in case we're inserting a proxy

staging/src/scala/quoted/staging/Compiler.scala

@@ -11,7 +11,7 @@ trait Compiler:
 
 object Compiler:
 
-  /** Create a new instance of the compiler using the the classloader of the application.
+  /** Create a new instance of the compiler using the classloader of the application.
    *
    *  Usage:
    *  ```

tests/neg-macros/tasty-macro-error/quoted_1.scala

@@ -6,7 +6,7 @@ object Macros {
 
   def impl(x: Expr[Any])(using Quotes) : Expr[Unit] = {
     import quotes.reflect.*
-    report.error("here is the the argument is " + x.asTerm.underlyingArgument.show, x.asTerm.underlyingArgument.pos)
+    report.error("here is the argument is " + x.asTerm.underlyingArgument.show, x.asTerm.underlyingArgument.pos)
     '{}
   }
 

tests/neg-macros/tasty-macro-positions/quoted_1.scala

@@ -7,8 +7,8 @@ object Macros {
   def impl(x: Expr[Any])(using Quotes) : Expr[Unit] = {
     import quotes.reflect.*
     val pos = x.asTerm.underlyingArgument.pos
-    report.error("here is the the argument is " + x.asTerm.underlyingArgument.show, pos)
-    report.error("here (+5) is the the argument is " + x.asTerm.underlyingArgument.show, Position(pos.sourceFile, pos.start + 5, pos.end + 5))
+    report.error("here is the argument is " + x.asTerm.underlyingArgument.show, pos)
+    report.error("here (+5) is the argument is " + x.asTerm.underlyingArgument.show, Position(pos.sourceFile, pos.start + 5, pos.end + 5))
     '{}
   }
 

tests/pos-with-compiler-cc/dotc/typer/Synthesizer.scala

@@ -498,7 +498,7 @@ class Synthesizer(typer: Typer)(using @constructorOnly c: Context):
           else
             refineAtPrefix(childPre, childClass, childClass.primaryConstructor.info) match
               case info: PolyType =>
-                // Compute the the full child type by solving the subtype constraint
+                // Compute the full child type by solving the subtype constraint
                 // `C[X1, ..., Xn] <: P`, where
                 //
                 //   - P is the current `mirroredType`