Review File and Symbol methods

- Deprecate File.null (use File::NULL constant, Ruby 1.9.3+)
- Deprecate File.read_binary (use File.binread, Ruby 1.9.3+)
- File: 14 remaining methods all unique, no changes needed
- Symbol: 14 methods all clean, no changes needed

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: trans

HISTORY.md

@@ -103,6 +103,8 @@ Changes:
   * Redefine `String#lchomp` / `#lchomp!` as aliases for `delete_prefix` / `delete_prefix!`.
   * Rename `Time#trunc` to `Time#floor_to` (parallels `Time#round_to`; avoids confusion
     with Ruby's `Time#floor` which takes sub-second digit precision). `trunc` deprecated.
+  * Deprecate `File.null` (use `File::NULL` constant, Ruby 1.9.3+).
+  * Deprecate `File.read_binary` (use `File.binread`, Ruby 1.9.3+).
   * Fix dead requires for removed `kernel/singleton_class` in Proc and Kernel.
   * Remove misplaced `applique/file_helpers` from core (test infrastructure).
   * Drop unused `test_files` directive from gemspec. (PR#301)

lib/core/facets/file/null.rb

@@ -1,21 +1,9 @@
 class File
 
-  # Platform dependent null device.
-  #
-  # CREDIT: Daniel Burger
-
+  # @deprecated Use File::NULL constant instead (built-in since Ruby 1.9.3).
   def self.null
-    case RUBY_PLATFORM
-    when /mswin/i
-      'NUL'
-    when /amiga/i
-      'NIL:'
-    when /openvms/i
-      'NL:'
-    else
-      '/dev/null'
-    end
+    warn "File.null is deprecated. Use File::NULL instead.", uplevel: 1
+    File::NULL
   end
 
 end
-

lib/core/facets/file/read_binary.rb

@@ -1,18 +1,9 @@
 class File
 
-  # Read in a file as binary data.
-  #
-  # Assuming we had a binary file 'binary.dat'.
-  #
-  #   File.read_binary('binary.dat')
-  #
-  # CREDIT: George Moschovitis
-
+  # @deprecated Use File.binread instead (built-in since Ruby 1.9.3).
   def self.read_binary(fname)
-    open(fname, 'rb') do |f|
-      return f.read
-    end
+    warn "File.read_binary is deprecated. Use File.binread instead.", uplevel: 1
+    binread(fname)
   end
 
 end
-