Rework valid_expression? as complete_expression?

lib/pry/default_commands/input.rb

@@ -113,7 +113,7 @@ class Pry
           eval_string << Array(code.each_line.to_a[range]).join
         end
 
-        run "show-input" if !_pry_.valid_expression?(eval_string)
+        run "show-input" if !_pry_.complete_expression?(eval_string)
       end
 
       command "hist", "Show and replay Readline history. Type `hist --help` for more info. Aliases: history" do |*args|

lib/pry/pry_instance.rb

@@ -259,7 +259,7 @@ class Pry
         output.puts "Error: #{e.message}"
       end
 
-      break if valid_expression?(eval_string)
+      break if complete_expression?(eval_string)
     end
 
     @suppress_output = true if eval_string =~ /;\Z/ || eval_string.empty?
@@ -544,9 +544,9 @@ class Pry
   # @return [Boolean] Whether or not the code is a complete Ruby expression.
   # @raise [SyntaxError] Any SyntaxError that does not represent incompleteness.
   # @example
-  #   valid_expression?("class Hello") #=> false
-  #   valid_expression?("class Hello; end") #=> true
-  def valid_expression?(str)
+  #   complete_expression?("class Hello") #=> false
+  #   complete_expression?("class Hello; end") #=> true
+  def complete_expression?(str)
     if defined?(Rubinius::Melbourne19) && RUBY_VERSION =~ /^1\.9/
       Rubinius::Melbourne19.parse_string(str, Pry.eval_path)
     elsif defined?(Rubinius::Melbourne)

test/test_pry.rb

@@ -216,11 +216,11 @@ describe Pry do
         end
       end
 
-      describe "valid_expression?" do
+      describe "complete_expression?" do
         it "should not mutate the input!" do
           clean = "puts <<-FOO\nhi\nFOO\n"
           a = clean.dup
-          Pry.new.valid_expression?(a)
+          Pry.new.complete_expression?(a)
           a.should == clean
         end
       end