Completely remove the use of Timeout

Timeout's implementation relies on Thread, which would conflict with
`ruby/debug`'s thread-freezing implementation and has casued issues like

- ruby/debug#877
- ruby/debug#934
- ruby/debug#1000

This commit avoids the issue by completely removing the use of Timeout.

Author: st0012

lib/reline.rb

@@ -396,7 +396,7 @@ def readline(prompt = '', add_hist = false)
     private def read_io(keyseq_timeout, &block)
       buffer = []
       loop do
-        c = io_gate.getc
+        c = io_gate.getc(Float::INFINITY)
         if c == -1
           result = :unmatched
           @bracketed_paste_finished = true

lib/reline/ansi.rb

@@ -1,6 +1,5 @@
 require 'io/console'
 require 'io/wait'
-require 'timeout'
 require_relative 'terminfo'
 
 class Reline::ANSI
@@ -154,7 +153,8 @@ def self.with_raw_input
   end
 
   @@buf = []
-  def self.inner_getc(count = 10)
+  # a single count is 0.1 sec
+  def self.inner_getc(count)
     unless @@buf.empty?
       return @@buf.shift
     end
@@ -174,17 +174,17 @@ def self.inner_getc(count = 10)
   @@in_bracketed_paste_mode = false
   START_BRACKETED_PASTE = String.new("\e[200~,", encoding: Encoding::ASCII_8BIT)
   END_BRACKETED_PASTE = String.new("\e[200~.", encoding: Encoding::ASCII_8BIT)
-  def self.getc_with_bracketed_paste
+  def self.getc_with_bracketed_paste(count)
     buffer = String.new(encoding: Encoding::ASCII_8BIT)
-    buffer << inner_getc
+    buffer << inner_getc(count)
     while START_BRACKETED_PASTE.start_with?(buffer) or END_BRACKETED_PASTE.start_with?(buffer) do
       if START_BRACKETED_PASTE == buffer
         @@in_bracketed_paste_mode = true
-        return inner_getc
+        return inner_getc(count)
       elsif END_BRACKETED_PASTE == buffer
         @@in_bracketed_paste_mode = false
         ungetc(-1)
-        return inner_getc
+        return inner_getc(count)
       end
       succ_c = inner_getc(Reline.core.config.keyseq_timeout)
 
@@ -197,14 +197,14 @@ def self.getc_with_bracketed_paste
     buffer.bytes.reverse_each do |ch|
       ungetc ch
     end
-    inner_getc
+    inner_getc(count)
   end
 
-  def self.getc
+  def self.getc(count)
     if Reline.core.config.enable_bracketed_paste
-      getc_with_bracketed_paste
+      getc_with_bracketed_paste(count)
     else
-      inner_getc
+      inner_getc(count)
     end
   end
 

lib/reline/general_io.rb

@@ -34,7 +34,7 @@ def self.with_raw_input
     yield
   end
 
-  def self.getc
+  def self.getc(_count)
     unless @@buf.empty?
       return @@buf.shift
     end

lib/reline/windows.rb

@@ -295,7 +295,7 @@ def self.with_raw_input
     yield
   end
 
-  def self.getc
+  def self.getc(_)
     check_input_event
     @@output_buf.shift
   end