Added an analyzer which keeps line breaks LF on every system (#1193)

app/Tests/Models/CapabilityCharacterizationTests.cs

@@ -58,7 +58,7 @@ public sealed class CapabilityCharacterizationTests
         }
 
         File.WriteAllText(CapabilitySnapshot.ACTUAL_FILE_PATH, current);
-        Assert.Fail($"The capabilities of {DescribeDifference(recorded, current)}{Environment.NewLine}{Environment.NewLine}The full result was written to {CapabilitySnapshot.ACTUAL_FILE_PATH}.");
+        Assert.Fail($"The capabilities of {DescribeDifference(recorded, current)}\n\nThe full result was written to {CapabilitySnapshot.ACTUAL_FILE_PATH}.");
     }
 
     /// <summary>
@@ -76,19 +76,19 @@ public sealed class CapabilityCharacterizationTests
         var added = currentLines.Keys.Except(recordedLines.Keys).ToList();
         var removed = recordedLines.Keys.Except(currentLines.Keys).ToList();
 
-        var message = new StringBuilder($"{changed.Count} model(s) changed, {added.Count} came into the corpus, {removed.Count} left it:").Append(Environment.NewLine);
+        var message = new StringBuilder($"{changed.Count} model(s) changed, {added.Count} came into the corpus, {removed.Count} left it:").Append('\n');
         foreach (var model in changed.Take(LINES_SHOWN))
         {
-            message.Append(Environment.NewLine).Append("  ").Append(model);
-            message.Append(Environment.NewLine).Append("    was: ").Append(recordedLines[model]);
-            message.Append(Environment.NewLine).Append("    now: ").Append(currentLines[model]);
+            message.Append('\n').Append("  ").Append(model);
+            message.Append('\n').Append("    was: ").Append(recordedLines[model]);
+            message.Append('\n').Append("    now: ").Append(currentLines[model]);
         }
 
         foreach (var model in added.Take(LINES_SHOWN))
-            message.Append(Environment.NewLine).Append("  + ").Append(model).Append(": ").Append(currentLines[model]);
+            message.Append('\n').Append("  + ").Append(model).Append(": ").Append(currentLines[model]);
 
         foreach (var model in removed.Take(LINES_SHOWN))
-            message.Append(Environment.NewLine).Append("  - ").Append(model).Append(": ").Append(recordedLines[model]);
+            message.Append('\n').Append("  - ").Append(model).Append(": ").Append(recordedLines[model]);
 
         return message.ToString();
     }

app/Tests/Models/Generation/CompilationHarness.cs

@@ -55,7 +55,7 @@ public static class CompilationHarness
             .Where(diagnostic => diagnostic.Severity is DiagnosticSeverity.Error)
             .Select(diagnostic => diagnostic.ToString());
 
-        return string.Join(Environment.NewLine, errors);
+        return string.Join('\n', errors);
     }
 
     /// <summary>