Rename master branch to main in the documentation

Author: anatoliykmetyuk

docs/blog/_posts/2019-06-11-16th-dotty-milestone-release.md

@@ -156,7 +156,7 @@ enum B(val gravity: Double) extends java.lang.Enum[B] {
 }
 ```
 
-For more information please check the [test case](https://github.com/lampepfl/dotty/tree/master/tests/run/enum-java) and
+For more information please check the [test case](https://github.com/lampepfl/dotty/tree/main/tests/run/enum-java) and
 also the relevant PRs [#6602](https://github.com/lampepfl/dotty/pull/6602) and
 [#6629](https://github.com/lampepfl/dotty/pull/6629).
 

docs/blog/_posts/2019-12-20-21th-dotty-milestone-release.md

@@ -48,7 +48,7 @@ It means that we can now put the Scala 3 compiler under heavy load, getting it
 ready for industrial strength applications. At the moment we have 23
 projects on our community projects and we expect this number to go up!
 
-> https://github.com/lampepfl/dotty/tree/master/community-build/community-projects
+> https://github.com/lampepfl/dotty/tree/main/community-build/community-projects
 
 This project contains tests to build and test a corpus of open sources Scala 2.x
 projects against Scala 3.

docs/blog/_posts/2020-04-29-24th-dotty-milestone-release.md

@@ -134,7 +134,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2020-06-22-25th-dotty-milestone-release.md

@@ -98,7 +98,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2020-07-27-26th-dotty-milestone-release.md

@@ -128,7 +128,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2020-08-31-27th-dotty-milestone-release.md

@@ -109,7 +109,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2020-11-09-scala3-m1.md

@@ -199,7 +199,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2020-12-18-scala3-m3.md

@@ -231,7 +231,7 @@ We are looking forward to having you join the team of contributors.
 
 ## Library authors: Join our community build
 
-Scala 3 is regularly tested against a sample of libraries known as the "community build". You can add your library to the [community build](https://github.com/lampepfl/dotty/tree/master/community-build) by submitting a PR.
+Scala 3 is regularly tested against a sample of libraries known as the "community build". You can add your library to the [community build](https://github.com/lampepfl/dotty/tree/main/community-build) by submitting a PR.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty
 

docs/blog/_posts/2021-03-31-scala3-rc2.md

@@ -116,7 +116,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2021-04-21-scala3-rc3.md

@@ -49,7 +49,7 @@ We are looking forward to having you join the team of contributors.
 
 Dotty now has a set of widely-used community libraries that are built against every nightly Dotty
 snapshot. Currently, this includes shapeless, ScalaPB, algebra, scalatest, scopt and squants.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2021-06-07-scala3.0.1-rc1-release.md

@@ -147,7 +147,7 @@ According to `git shortlog -sn --no-merges 3.0.0-RC2..3.0.1-RC1`† these are:
 ## Library authors: Join our community build
 
 Scala 3 now has a set of widely-used community libraries that are built against every nightly Scala 3 snapshot.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/blog/_posts/2021-06-25-scala301-rc2.md

@@ -29,7 +29,7 @@ According to `git shortlog -sn --no-merges 3.0.1-RC1..3.0.1-RC2` these are:
 ## Library authors: Join our community build
 
 Scala 3 now has a set of widely-used community libraries that are built against every nightly Scala 3 snapshot.
-Join our [community build](https://github.com/lampepfl/dotty/tree/master/community-build)
+Join our [community build](https://github.com/lampepfl/dotty/tree/main/community-build)
 to make sure that our regression suite includes your library.
 
 [Scastie]: https://scastie.scala-lang.org/?target=dotty

docs/docs/contributing/debugging.md

@@ -164,7 +164,7 @@ val YshowVarBounds    = BooleanSetting("-Yshow-var-bounds"   , "Print type varia
 val YtestPickler      = BooleanSetting("-Ytest-pickler"      , "self-test for pickling functionality; should be used with -Ystop-after:pickler")
 ```
 
-They are defined in [ScalaSettings.scala](https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala). E.g. `YprintPos` is defined as:
+They are defined in [ScalaSettings.scala](https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/config/ScalaSettings.scala). E.g. `YprintPos` is defined as:
 
 ```scala
 val YprintPos: Setting[Boolean] = BooleanSetting("-Yprint-pos", "show tree positions.")

docs/docs/contributing/getting-started.md

@@ -89,7 +89,7 @@ $ sbt
 For more information, see `scaladoc/README.md`.
 
 Before contributing to Dotty, we invite you to consult the
-[Dotty Developer Guidelines](https://github.com/lampepfl/dotty/blob/master/CONTRIBUTING.md).
+[Dotty Developer Guidelines](https://github.com/lampepfl/dotty/blob/main/CONTRIBUTING.md).
 
 
 Community

docs/docs/internals/overall-structure.md

@@ -233,10 +233,10 @@ Phases fall into four categories:
 * Code generators: These map the transformed trees to Java classfiles or
   .sjsir files.
 
-[dotty.tools]: https://github.com/lampepfl/dotty/tree/master/compiler/src/dotty/tools
-[dotc]: https://github.com/lampepfl/dotty/tree/master/compiler/src/dotty/tools/dotc
-[Main]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/Main.scala
-[Driver]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/Driver.scala
-[Compiler]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/Compiler.scala
-[Run]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/Run.scala
-[Context]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/core/Contexts.scala
+[dotty.tools]: https://github.com/lampepfl/dotty/tree/main/compiler/src/dotty/tools
+[dotc]: https://github.com/lampepfl/dotty/tree/main/compiler/src/dotty/tools/dotc
+[Main]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/Main.scala
+[Driver]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/Driver.scala
+[Compiler]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/Compiler.scala
+[Run]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/Run.scala
+[Context]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/core/Contexts.scala

docs/docs/internals/type-system.md

@@ -132,8 +132,8 @@ TODO
 ## Type inference via constraint solving ##
 TODO
 
-[1]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/core/Types.scala
+[1]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/core/Types.scala
 [2]: https://github.com/samuelgruetter/dotty/blob/classdiagrampdf/dotty-types.pdf
 [3]: https://github.com/samuelgruetter/scaladiagrams/tree/print-descendants
-[4]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/core/TypeComparer.scala
-[5]: https://github.com/lampepfl/dotty/blob/master/tests/pos/refinedSubtyping.scala
+[4]: https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/core/TypeComparer.scala
+[5]: https://github.com/lampepfl/dotty/blob/main/tests/pos/refinedSubtyping.scala

docs/docs/reference/changed-features/structural-types-spec.md

@@ -16,7 +16,7 @@ RefineStat    ::= ‘val’ VarDcl | ‘def’ DefDcl | ‘type’ {nl} TypeDcl
 ## Implementation of Structural Types
 
 The standard library defines a universal marker trait
-[`scala.Selectable`](https://github.com/lampepfl/dotty/blob/master/library/src/scala/Selectable.scala):
+[`scala.Selectable`](https://github.com/lampepfl/dotty/blob/main/library/src/scala/Selectable.scala):
 
 ```scala
 trait Selectable extends Any

docs/docs/reference/contextual/multiversal-equality.md

@@ -25,7 +25,7 @@ the program will still typecheck, since values of all types can be compared with
 But it will probably give unexpected results and fail at runtime.
 
 Multiversal equality is an opt-in way to make universal equality safer.
-It uses a binary type class [`scala.CanEqual`](https://github.com/lampepfl/dotty/blob/master/library/src/scala/CanEqual.scala)
+It uses a binary type class [`scala.CanEqual`](https://github.com/lampepfl/dotty/blob/main/library/src/scala/CanEqual.scala)
 to indicate that values of two given types can be compared with each other.
 The example above would not typecheck if `S` or `T` was a class
 that derives `CanEqual`, e.g.
@@ -70,7 +70,7 @@ given CanEqual[A, B] = CanEqual.derived
 given CanEqual[B, A] = CanEqual.derived
 ```
 
-The [`scala.CanEqual`](https://github.com/lampepfl/dotty/blob/master/library/src/scala/CanEqual.scala)
+The [`scala.CanEqual`](https://github.com/lampepfl/dotty/blob/main/library/src/scala/CanEqual.scala)
 object defines a number of `CanEqual` given instances that together
 define a rule book for what standard types can be compared (more details below).
 

docs/docs/reference/enums/enums.md

@@ -152,7 +152,7 @@ scala> Color.Red.compareTo(Color.Green)
 val res15: Int = -1
 ```
 
-For a more in-depth example of using Scala 3 enums from Java, see [this test](https://github.com/lampepfl/dotty/tree/master/tests/run/enum-java). In the test, the enums are defined in the `MainScala.scala` file and used from a Java source, `Test.java`.
+For a more in-depth example of using Scala 3 enums from Java, see [this test](https://github.com/lampepfl/dotty/tree/main/tests/run/enum-java). In the test, the enums are defined in the `MainScala.scala` file and used from a Java source, `Test.java`.
 
 ### Implementation
 

docs/docs/reference/experimental/explicit-nulls.md

@@ -426,7 +426,7 @@ When dealing with local mutable variables, there are two questions:
      x = null
    ```
 
-See [more examples](https://github.com/lampepfl/dotty/blob/master/tests/explicit-nulls/neg/flow-varref-in-closure.scala).
+See [more examples](https://github.com/lampepfl/dotty/blob/main/tests/explicit-nulls/neg/flow-varref-in-closure.scala).
 
 Currently, we are unable to track paths with a mutable variable prefix.
 For example, `x.a` if `x` is mutable.

docs/docs/reference/new-types/dependent-function-types-spec.md

@@ -46,7 +46,7 @@ same way that other functions do, see
 The example below defines a trait `C` and the two dependent function types
 `DF` and `IDF` and prints the results of the respective function applications:
 
-[depfuntype.scala]: https://github.com/lampepfl/dotty/blob/master/tests/pos/depfuntype.scala
+[depfuntype.scala]: https://github.com/lampepfl/dotty/blob/main/tests/pos/depfuntype.scala
 
 ```scala
 trait C { type M; val m: M }
@@ -70,7 +70,7 @@ type IDF = (x: C) ?=> x.M
 
 In the following example the depend type `f.Eff` refers to the effect type `CanThrow`:
 
-[eff-dependent.scala]: https://github.com/lampepfl/dotty/blob/master/tests/run/eff-dependent.scala
+[eff-dependent.scala]: https://github.com/lampepfl/dotty/blob/main/tests/run/eff-dependent.scala
 
 ```scala
 trait Effect

docs/docs/reference/new-types/intersection-types-spec.md

@@ -98,7 +98,7 @@ glb(A, _)                 = A                     // use first
 In the above, `|T|` means the erased type of `T`, `JArray` refers to
 the type of Java Array.
 
-See also: [`TypeErasure#erasedGlb`](https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/core/TypeErasure.scala#L289).
+See also: [`TypeErasure#erasedGlb`](https://github.com/lampepfl/dotty/blob/main/compiler/src/dotty/tools/dotc/core/TypeErasure.scala#L289).
 
 ## Relationship with Compound Type (`with`)