Prefer to use File.foreach instead of IO.foreach

ext/fiddle/win32/libffi-config.rb

@@ -23,7 +23,7 @@ until ARGV.empty?
   end
 end
 
-IO.foreach("#{srcdir}/configure.ac") do |line|
+File.foreach("#{srcdir}/configure.ac") do |line|
   if /^AC_INIT\((.*)\)/ =~ line
     version = $1.split(/,\s*/)[1]
     version.gsub!(/\A\[|\]\z/, '')

lib/net/http/status.rb

@@ -4,7 +4,7 @@ require_relative '../http'
 
 if $0 == __FILE__
   require 'open-uri'
-  IO.foreach(__FILE__) do |line|
+  File.foreach(__FILE__) do |line|
     puts line
     break if line.start_with?('end')
   end

test/ruby/enc/test_case_comprehensive.rb

@@ -37,7 +37,7 @@ TestComprehensiveCaseMapping.data_files_available? and  class TestComprehensiveC
   end
 
   def self.read_data_file(filename)
-    IO.foreach(expand_filename(filename), encoding: Encoding::ASCII_8BIT) do |line|
+    File.foreach(expand_filename(filename), encoding: Encoding::ASCII_8BIT) do |line|
       if $. == 1
         if filename == 'UnicodeData'
         elsif line.start_with?("# #{filename}-#{UNICODE_VERSION}.txt")

test/ruby/enc/test_emoji_breaks.rb

@@ -75,7 +75,7 @@ class TestEmojiBreaks < Test::Unit::TestCase
       EMOJI_DATA_FILES.each do |file|
         version_mismatch = true
         file_tests = []
-        IO.foreach(file.fullname, encoding: Encoding::UTF_8) do |line|
+        File.foreach(file.fullname, encoding: Encoding::UTF_8) do |line|
           line.chomp!
           if $.==1
             if line=="# #{file.basename}-#{file.version}.txt"

test/ruby/enc/test_grapheme_breaks.rb

@@ -44,7 +44,7 @@ class TestGraphemeBreaksFromFile < Test::Unit::TestCase
   if file_available?
     def read_data
       tests = []
-      IO.foreach(GRAPHEME_BREAK_TEST_FILE, encoding: Encoding::UTF_8) do |line|
+      File.foreach(GRAPHEME_BREAK_TEST_FILE, encoding: Encoding::UTF_8) do |line|
         if $. == 1 and not line.start_with?("# GraphemeBreakTest-#{UNICODE_VERSION}.txt")
           raise "File Version Mismatch"
         end

tool/enc-case-folding.rb

@@ -61,7 +61,7 @@ class CaseFolding
     @version = nil
     turkic = []
 
-    IO.foreach(filename, mode: "rb") do |line|
+    File.foreach(filename, mode: "rb") do |line|
       @version ||= line[/-([0-9.]+).txt/, 1]
       next unless res = pattern.match(line)
       ch_from = res[1].to_i(16)
@@ -230,7 +230,7 @@ class CaseMapping
     @specials = []
     @specials_length = 0
     @version = nil
-    IO.foreach(File.join(mapping_directory, 'UnicodeData.txt'), mode: "rb") do |line|
+    File.foreach(File.join(mapping_directory, 'UnicodeData.txt'), mode: "rb") do |line|
       next if line =~ /^</
       code, _, _, _, _, _, _, _, _, _, _, _, upper, lower, title = line.chomp.split ';'
       unless upper and lower and title and (upper+lower+title)==''
@@ -239,7 +239,7 @@ class CaseMapping
     end
 
     @filename = File.join(mapping_directory, 'SpecialCasing.txt')
-    IO.foreach(@filename, mode: "rb") do |line|
+    File.foreach(@filename, mode: "rb") do |line|
       @version ||= line[/-([0-9.]+).txt/, 1]
       line.chomp!
       line, comment = line.split(/ *#/)

tool/enc-unicode.rb

@@ -59,7 +59,7 @@ def parse_unicode_data(file)
   data = {'Any' => (0x0000..0x10ffff).to_a, 'Assigned' => [],
     'ASCII' => (0..0x007F).to_a, 'NEWLINE' => [0x0a], 'Cn' => []}
   beg_cp = nil
-  IO.foreach(file) do |line|
+  File.foreach(file) do |line|
     fields = line.split(';')
     cp = fields[0].to_i(16)
 

tool/extlibs.rb

@@ -185,7 +185,7 @@ class ExtLibs
     extracted = false
     dest = File.dirname(list)
     url = chksums = nil
-    IO.foreach(list) do |line|
+    File.foreach(list) do |line|
       line.sub!(/\s*#.*/, '')
       if /^(\w+)\s*=\s*(.*)/ =~ line
         vars[$1] = vars.expand($2)

tool/lib/memory_status.rb

@@ -12,7 +12,7 @@ module Memory
     PROC_FILE = procfile
     VM_PAT = pat
     def self.read_status
-      IO.foreach(PROC_FILE, encoding: Encoding::ASCII_8BIT) do |l|
+      File.foreach(PROC_FILE, encoding: Encoding::ASCII_8BIT) do |l|
         yield($1.downcase.intern, $2.to_i * 1024) if VM_PAT =~ l
       end
     end

tool/mkconfig.rb

@@ -205,7 +205,7 @@ print "  CONFIG = {}\n"
 print "  CONFIG[\"DESTDIR\"] = DESTDIR\n"
 
 versions = {}
-IO.foreach(File.join(srcdir, "version.h")) do |l|
+File.foreach(File.join(srcdir, "version.h")) do |l|
   m = /^\s*#\s*define\s+RUBY_(PATCHLEVEL)\s+(-?\d+)/.match(l)
   if m
     versions[m[1]] = m[2]
@@ -226,7 +226,7 @@ IO.foreach(File.join(srcdir, "version.h")) do |l|
   end
 end
 if versions.size != 4
-  IO.foreach(File.join(srcdir, "include/ruby/version.h")) do |l|
+  File.foreach(File.join(srcdir, "include/ruby/version.h")) do |l|
     m = /^\s*#\s*define\s+RUBY_API_VERSION_(\w+)\s+(-?\d+)/.match(l)
     if m
       versions[m[1]] ||= m[2]

win32/mkexports.rb

@@ -49,7 +49,7 @@ class Exports
   end
 
   def read_substitution(header, syms, winapis)
-    IO.foreach(header) do |line|
+    File.foreach(header) do |line|
       if /^#define (\w+)\((.*?)\)\s+(?:\(void\))?(rb_w32_\w+)\((.*?)\)\s*$/ =~ line and
           $2.delete(" ") == $4.delete(" ")
         export, internal = $1, $3