Add .editorconfig; strip BOM from C# sources to match it

.editorconfig

@@ -0,0 +1,21 @@
+# .gitattributes settles what git stores; this settles what an editor writes.
+# Git has no concept of encoding, so a byte-order mark is content it preserves
+# rather than normalizes - which is how this repository ended up with both forms.
+
+root = true
+
+[*.cs]
+charset = utf-8
+end_of_line = crlf
+insert_final_newline = true
+
+# Windows PowerShell 5.1 treats BOM-less files as the system code page.
+[*.ps1]
+charset = utf-8-bom
+end_of_line = crlf
+insert_final_newline = true
+
+[*.{sh,bash}]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true

sources/LineEndingNormalizer.Tests/BomlessUtf32RefusalTests.cs

@@ -1,4 +1,4 @@
-using System.Text;
+using System.Text;
 
 namespace LineEndingNormalizer.Tests;
 

sources/LineEndingNormalizer.Tests/LosslessFileWriterTests.cs

@@ -1,4 +1,4 @@
-using System.ComponentModel;
+using System.ComponentModel;
 using System.Text;
 
 namespace LineEndingNormalizer.Tests;

sources/LineEndingNormalizer.Tests/ProgramEndToEndTests.cs

@@ -1,4 +1,4 @@
-using System.Text;
+using System.Text;
 
 namespace LineEndingNormalizer.Tests;
 

sources/LineEndingNormalizer/BomlessUnicodeSafety.cs

@@ -1,4 +1,4 @@
-using System.Buffers;
+using System.Buffers;
 using System.Text;
 
 namespace LineEndingNormalizer;

sources/LineEndingNormalizer/ConversionRefusedException.cs

@@ -1,4 +1,4 @@
-namespace LineEndingNormalizer;
+namespace LineEndingNormalizer;
 
 /// <summary>
 /// Identifies a file that LEN deliberately left unchanged because conversion

sources/LineEndingNormalizer/FilePatternMatcher.cs

@@ -1,4 +1,4 @@
-using System.Text.RegularExpressions;
+using System.Text.RegularExpressions;
 
 namespace LineEndingNormalizer;
 

sources/LineEndingNormalizer/LineEnding.cs

@@ -1,4 +1,4 @@
-namespace LineEndingNormalizer;
+namespace LineEndingNormalizer;
 
 /// <summary>
 /// Supported output line-ending styles.

sources/LineEndingNormalizer/LosslessFileWriter.cs

@@ -1,4 +1,4 @@
-using System.Buffers;
+using System.Buffers;
 using System.ComponentModel;
 using System.IO.Hashing;
 using System.Runtime.InteropServices;

sources/LineEndingNormalizer/NewLineNormalizer.cs

@@ -1,4 +1,4 @@
-namespace LineEndingNormalizer;
+namespace LineEndingNormalizer;
 
 /// <summary>
 /// Detects encodings and normalizes line endings while preserving

sources/LineEndingNormalizer/Options.cs

@@ -1,4 +1,4 @@
-namespace LineEndingNormalizer;
+namespace LineEndingNormalizer;
 
 /// <summary>
 /// Command-line options.

sources/LineEndingNormalizer/Program.cs

@@ -1,4 +1,4 @@
-using System.ComponentModel;
+using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Text;
 using System.Text.RegularExpressions;

sources/LineEndingNormalizer/TextEncoding.cs

@@ -1,4 +1,4 @@
-using System.Text;
+using System.Text;
 using System.Buffers;
 using UtfUnknown;
 

sources/LineEndingNormalizer/TextValidation.cs

@@ -1,4 +1,4 @@
-using System.Buffers;
+using System.Buffers;
 using System.Globalization;
 using System.Text;
 

sources/LineEndingNormalizer/UnicodeDetector.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Text;
 
 namespace LineEndingNormalizer;