Unexpected modified marks

1. Line Ending CRLF

1. core.autocrlf true

1. input is modified - to LF.

1. output is modified - to CRLF on windows.

2. core.autocrlf input

1. input is modified - to LF.

1. output is kept as it is.

3. core.autocrlf off

1. input not modified.

1. output not modified.

2. File mode

1. git diff .\middleware.ts.

2. diff --git a/middleware.ts b/middleware.ts

1. old mode 100755.

1. new mode 100644.

1. git config core.fileMode false.