[CI] Add prek hook end-of-file-fixer; Auto fix C# files

Author: jbampton

.pre-commit-config.yaml

@@ -31,6 +31,7 @@
 # | **Priority 10** | `identity`, `check-hooks-apply` | **Meta & Setup**: Ensure environment is valid before executing heavy checks. |
 # | **Priority 20** | `fix-byte-order-marker` | **File Cleanups (Broad)**: Fix BOM first so subsequent steps work with clean UTF-8 text. |
 # | **Priority 30** | `trailing-whitespace` | **Formatting (Broad)**: Cleans up whitespace on files before other hooks validate them. |
+# | **Priority 35** | `end-of-file-fixer` | **File Cleanups (Broad)**: Makes sure files end in a newline and only a newline. |
 # | **Priority 40** | `doctoc`, `oxipng`, `file-contents-sorter` | **Disjoint Modifiers**: These modify different sets of files (`README.md`, `.png` files, and `codespell.txt` respectively). Running them concurrently is safe. |
 # | **Priority 50** | `codespell`, `check-ast`, `check-builtin-literals`, `check-case-conflict`, `check-executables-have-shebangs`, `check-illegal-windows-names`, `check-json`, `check-merge-conflict`, `check-vcs-permalinks`, `check-xml`, `check-yaml`, `debug-statements`, `detect-aws-credentials`, `detect-private-key`, `forbid-submodules`, `gitleaks`, `bandit`|
 # |                 | **Read-Only / Syntax / Security**: The bulk of the suite. These hooks only read and validate files without modifying them, allowing full parallel execution. |
@@ -80,6 +81,11 @@ repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: 3e8a8703264a2f4a69428a0aa4dcb512790b2c8c # frozen: v6.0.0
     hooks:
+      - id: end-of-file-fixer
+        name: run end-of-file-fixer
+        description: makes sure files end in a newline and only a newline
+        files: \.cs$
+        priority: 35
       - id: trailing-whitespace
         name: run trailing-whitespace
         description: trims trailing whitespace

src/Lucene.Net.Classification/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("ff6180c7-579d-4557-bf6a-ddd139fad2e4")]
-
-

src/Lucene.Net.Codecs/Appending/AppendingCodec.cs

@@ -43,4 +43,3 @@ public AppendingCodec()
         public override PostingsFormat PostingsFormat => _postings;
     }
 }
-

src/Lucene.Net.Codecs/Appending/AppendingPostingsFormat.cs

@@ -59,4 +59,3 @@ public override FieldsProducer FieldsProducer(SegmentReadState state)
         }
     }
 }
-

src/Lucene.Net.Codecs/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("03ad88e5-c647-4821-9c75-ca5507ab18f0")]
-
-

src/Lucene.Net.Demo/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("4bcd7980-0cf4-4da0-b069-f555a41cb44d")]
-
-

src/Lucene.Net.Expressions/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("6f5d9768-c42b-4dca-881b-001f61618cac")]
-
-

src/Lucene.Net.Grouping/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("02bab603-067d-48b1-aedd-316849652568")]
-
-

src/Lucene.Net.Queries/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("76a14bc5-8f0f-4de4-b501-423d4c1a20a5")]
-
-

src/Lucene.Net.Sandbox/Properties/AssemblyInfo.cs

@@ -38,5 +38,3 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("13274ba9-9052-4354-8ffe-e3f32593368f")]
-
-