Fix winmerge left/right (#301)

Author: SimonCropp

docs/diff-tool.md

@@ -600,7 +600,7 @@ Non-MDI tools are preferred since it allows [DiffEngineTray](tray.md) to track a
 
 #### Windows settings:
 
- * Example target on left arguments: `/u /wl /e "targetFile.txt" "tempFile.txt" /dl "targetFile.txt" /dr "tempFile.txt" `
+ * Example target on left arguments: `/u /wr /e "targetFile.txt" "tempFile.txt" /dl "targetFile.txt" /dr "tempFile.txt" `
  * Example target on right arguments: `/u /wl /e "tempFile.txt" "targetFile.txt" /dl "tempFile.txt" /dr "targetFile.txt" `
  * Scanned paths: 
  * `%PATH%WinMergeU.exe`

docs/diff-tool.order.md

@@ -53,5 +53,5 @@ For example `VisualStudio,Meld` will result in VisualStudio then Meld then all o
 ```cs
 DiffTools.UseOrder(DiffTool.VisualStudio, DiffTool.AraxisMerge);
 ```
-<sup><a href='/src/DiffEngine.Tests/DiffToolsTest.cs#L128-L130' title='Snippet source file'>snippet source</a> | <a href='#snippet-useorder' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/DiffEngine.Tests/DiffToolsTest.cs#L134-L136' title='Snippet source file'>snippet source</a> | <a href='#snippet-useorder' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->

src/DiffEngine.Tests/DiffToolsTest.cs

@@ -120,7 +120,13 @@ async Task AddToolAndLaunch()
  // Path.Combine(SourceDirectory, "input.target.txt"));
  // }
  //}
-
+ /**
+ [Fact]
+ public Task LaunchSpecificTextDiff() =>
+ DiffRunner.LaunchAsync(DiffTool.WinMerge,
+ Path.Combine(SourceDirectory, "input.temp.txt"),
+ Path.Combine(SourceDirectory, "input.target.txt"));
+ **/
 #if DEBUG
  [Fact]
  public void ChangeOrder()

src/DiffEngine.Tests/diffTools.include.md

@@ -489,7 +489,7 @@ Non-MDI tools are preferred since it allows [DiffEngineTray](tray.md) to track a
 
 #### Windows settings:
 
- * Example target on left arguments: `/u /wl /e "targetFile.txt" "tempFile.txt" /dl "targetFile.txt" /dr "tempFile.txt" `
+ * Example target on left arguments: `/u /wr /e "targetFile.txt" "tempFile.txt" /dl "targetFile.txt" /dr "tempFile.txt" `
  * Example target on right arguments: `/u /wl /e "tempFile.txt" "targetFile.txt" /dl "tempFile.txt" /dr "targetFile.txt" `
  * Scanned paths: 
  * `%PATH%WinMergeU.exe`

src/DiffEngine/Implementation/WinMerge.cs

@@ -6,7 +6,7 @@ static string LeftArguments(string temp, string target)
  {
  var tempTitle = Path.GetFileName(temp);
  var targetTitle = Path.GetFileName(target);
- return $"/u /wl /e \"{target}\" \"{temp}\" /dl \"{targetTitle}\" /dr \"{tempTitle}\"";
+ return $"/u /wr /e \"{target}\" \"{temp}\" /dl \"{targetTitle}\" /dr \"{tempTitle}\"";
  }
 
  static string RightArguments(string temp, string target)