Fix bunch of links to master to point to v2.x branch

Fixes #2063
Related to #2050

README.md

@@ -2,9 +2,9 @@
 ![catch logo](artwork/catch2-logo-small.png)
 
 [![Github Releases](https://img.shields.io/github/release/catchorg/catch2.svg)](https://github.com/catchorg/catch2/releases)
-[![Build Status](https://travis-ci.org/catchorg/Catch2.svg?branch=master)](https://travis-ci.org/catchorg/Catch2)
+[![Build Status](https://travis-ci.org/catchorg/Catch2.svg?branch=v2.x)](https://travis-ci.org/catchorg/Catch2)
 [![Build status](https://ci.appveyor.com/api/projects/status/github/catchorg/Catch2?svg=true)](https://ci.appveyor.com/project/catchorg/catch2)
-[![codecov](https://codecov.io/gh/catchorg/Catch2/branch/master/graph/badge.svg)](https://codecov.io/gh/catchorg/Catch2)
+[![codecov](https://codecov.io/gh/catchorg/Catch2/branch/v2.x/graph/badge.svg)](https://codecov.io/gh/catchorg/Catch2)
 [![Try online](https://img.shields.io/badge/try-online-blue.svg)](https://wandbox.org/permlink/6JUH8Eybx4CtvkJS)
 [![Join the chat in Discord: https://discord.gg/4CWS9zD](https://img.shields.io/badge/Discord-Chat!-brightgreen.svg)](https://discord.gg/4CWS9zD)
 

codecov.yml

@@ -19,7 +19,7 @@ coverage:
 
 
 codecov:
-  branch: master
+  branch: v2.x
 
 comment:
   layout: "diff"

docs/contributing.md

@@ -21,8 +21,8 @@ to the codebase itself.
 
 ## Using Git(Hub)
 
-Ongoing development happens in the `master` branch for Catch2 v2, and in
-`dev-v3` for the next major version, v3.
+Ongoing development happens in the `v2.x` branch for Catch2 v2, and in
+`devel` for the next major version, v3.
 
 Commits should be small and atomic. A commit is atomic when, after it is
 applied, the codebase, tests and all, still works as expected. Small

docs/release-notes.md

@@ -666,7 +666,7 @@ than `single_include/catch.hpp`.**
 * CLR objects (`T^`) can now be stringified (#1216)
   * This affects code compiled as C++/CLI
 * Added `PredicateMatcher`, a matcher that takes an arbitrary predicate function (#1236)
-  * See [documentation for details](https://github.com/catchorg/Catch2/blob/master/docs/matchers.md)
+  * See [documentation for details](https://github.com/catchorg/Catch2/blob/v2.x/docs/matchers.md)
 
 ### Others
 * Modified CMake-installed pkg-config to allow `#include <catch.hpp>`(#1239)
@@ -694,7 +694,7 @@ than `single_include/catch.hpp`.**
 * Added an option to warn (+ exit with error) when no tests were ran (#1158)
   * Use as `-w NoTests`
 * Added provisional support for Emscripten (#1114)
-* [Added a way to override the fallback stringifier](https://github.com/catchorg/Catch2/blob/master/docs/configuration.md#fallback-stringifier) (#1024)
+* [Added a way to override the fallback stringifier](https://github.com/catchorg/Catch2/blob/v2.x/docs/configuration.md#fallback-stringifier) (#1024)
   * This allows project's own stringification machinery to be easily reused for Catch
 * `Catch::Session::run()` now accepts `char const * const *`, allowing it to accept array of string literals (#1031, #1178)
   * The embedded version of Clara was bumped to v1.1.3

docs/tutorial.md

@@ -13,7 +13,7 @@
 
 ## Getting Catch2
 
-The simplest way to get Catch2 is to download the latest [single header version](https://raw.githubusercontent.com/catchorg/Catch2/master/single_include/catch2/catch.hpp). The single header is generated by merging a set of individual headers but it is still just normal source code in a header file.
+The simplest way to get Catch2 is to download the latest [single header version](https://raw.githubusercontent.com/catchorg/Catch2/v2.x/single_include/catch2/catch.hpp). The single header is generated by merging a set of individual headers but it is still just normal source code in a header file.
 
 Alternative ways of getting Catch2 include using your system package
 manager, or installing it using [its CMake package](cmake-integration.md#installing-catch2-from-git-repository).