extra VS scan paths (#6)

Author: SimonCropp

docs/diff-tool.md

@@ -376,6 +376,7 @@ This behavior is currently supported on Windows. On Linux and OSX, tool instance
  * Example arguments: `/diff "targetFile" "tempFile"`
  * Scanned paths:
 
+   * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Preview\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Community\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\devenv.exe`
@@ -395,7 +396,10 @@ This behavior is currently supported on Windows. On Linux and OSX, tool instance
 
 
  * Example arguments: `--diff "targetFile" "tempFile"`
- * Scanned path: `%LOCALAPPDATA%\Programs\Microsoft VS Code\code.exe`
+ * Scanned paths:
+
+   * `%LocalAppData%\Programs\Microsoft VS Code\code.exe`
+   * `%ProgramFiles%\Microsoft VS Code\bin\code`
 
 ### OSX settings:
 

src/DiffEngine.Tests/diffTools.include.md

@@ -299,6 +299,7 @@
  * Example arguments: `/diff "targetFile" "tempFile"`
  * Scanned paths:
 
+   * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Preview\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Community\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe`
    * `%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\devenv.exe`
@@ -318,7 +319,10 @@
 
 
  * Example arguments: `--diff "targetFile" "tempFile"`
- * Scanned path: `%LOCALAPPDATA%\Programs\Microsoft VS Code\code.exe`
+ * Scanned paths:
+
+   * `%LocalAppData%\Programs\Microsoft VS Code\code.exe`
+   * `%ProgramFiles%\Microsoft VS Code\bin\code`
 
 ### OSX settings:
 

src/DiffEngine/Implementation/VisualStudio.cs

@@ -14,6 +14,7 @@ public static ToolDefinition VisualStudio() =>
             buildArguments: (tempFile, targetFile) => $"/diff \"{targetFile}\" \"{tempFile}\"",
             windowsExePaths: new[]
             {
+                @"%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Preview\Common7\IDE\devenv.exe",
                 @"%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Community\Common7\IDE\devenv.exe",
                 @"%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe",
                 @"%ProgramFiles(x86)%\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\devenv.exe",

src/DiffEngine/Implementation/VsCode.cs

@@ -14,7 +14,8 @@ public static ToolDefinition VsCode() =>
             buildArguments: (tempFile, targetFile) => $"--diff \"{targetFile}\" \"{tempFile}\"",
             windowsExePaths: new[]
             {
-                @"%LOCALAPPDATA%\Programs\Microsoft VS Code\code.exe"
+                @"%LocalAppData%\Programs\Microsoft VS Code\code.exe",
+                @"%ProgramFiles%\Microsoft VS Code\bin\code"
             },
             binaryExtensions: Array.Empty<string>(),
             linuxExePaths: new[]