remove compsci and NEWLINE dependency

- remove CompSci.numeric! and friends

lib/compsci.rb

@@ -1,34 +1,10 @@
 module CompSci
-  NEWLINE = $/ # platform-default line separator
-
   # thanks apeiros
   # https://gist.github.com/rickhull/d0b579aa08c85430b0dc82a791ff12d6
   def self.power_of?(num, base)
     return false if base <= 1
     mod = 0
-    num, mod = num.divmod(base) until num == 1 || mod > 0
+    num, mod = num.divmod(base) until (num == 1) || (mod > 0)
     mod == 0
   end
-
-  def self.numeric!(num)
-    raise(ArgumentError, num.inspect) unless num.is_a?(Numeric)
-    num
-  end
-
-  def self.positive!(num)
-    numeric!(num)
-    raise(ArgumentError, num.inspect) unless num >= 0
-    num
-  end
-
-  def self.string!(str)
-    raise(ArgumentError, str.inspect) unless str.is_a?(String)
-    str
-  end
-
-  def self.nonempty!(str)
-    string!(str)
-    raise(ArgumentError, str.inspect) if str.empty?
-    str
-  end
 end

lib/compsci/fsm.rb

@@ -147,7 +147,7 @@ def follow(src, value)
 
     # initial, final, graph
     def to_s
-      [[@initial, @final].inspect, @graph].join(NEWLINE)
+      [[@initial, @final].inspect, @graph].join($/)
     end
 
     def eval(state)

lib/compsci/node.rb

@@ -1,5 +1,3 @@
-require 'compsci'
-
 module CompSci
   # has a value and an array of children; allows child gaps
   class Node
@@ -51,7 +49,7 @@ def display(width: 80)
           memo + Array.new(@children.size) { |i| n and n.children[i] }
         }
       end
-      lines.join(NEWLINE)
+      lines
     end
   end
 

lib/compsci/simplex.rb

@@ -2,8 +2,6 @@
 # which was forked in 2017 from https://github.com/danlucraft/simplex
 # which had its last commit in 2013
 
-require 'compsci'
-
 module CompSci
   class Simplex
     DEFAULT_MAX_PIVOTS = 10_000
@@ -168,7 +166,7 @@ def formatted_tableau
       lines = result.map { |ary| ary.join("  ") }
       max_line_length = lines.map(&:length).max
       lines.insert(1, "-"*max_line_length)
-      lines.join(NEWLINE)
+      lines
     end
   end
 end

sig/compsci.rbs

@@ -1,9 +1,3 @@
 module CompSci
-  NEWLINE: String
-
   def self.power_of?: (Numeric, Numeric) -> bool
-  def self.numeric!: (untyped) -> Numeric
-  def self.positive!: (untyped) -> Numeric
-  def self.string!: (untyped) -> String
-  def self.nonempty!: (untyped) -> String
 end

test/flex_node.rb

@@ -97,9 +97,7 @@
       item_count = 31
       # tree already has a root node
       (item_count - 1).times { @root.push(rand(99), @child_slots) }
-      str = @root.display
-      line_count = str.split(NEWLINE).size
-      expect(line_count).must_equal Math.log(item_count + 1, 2).ceil
+      expect(@root.display.size).must_equal Math.log(item_count + 1, 2).ceil
     end
 
     describe "searching" do

test/simplex.rb

@@ -237,7 +237,7 @@ def test_manual_iteration
       [0, 0, 1]
     )
     while simplex.can_improve?
-      assert simplex.formatted_tableau.is_a?(String)
+      assert simplex.formatted_tableau.is_a?(Array)
       simplex.pivot
     end
     result = simplex.solution