Revert "Merge SendNodeSyntax into Syntax"

This reverts commit a9e6c9d66e78d2ac51a267728c63c8f15b18f25c.

Conflicts:
	lib/transpec/syntax.rb
	lib/transpec/syntax/double.rb
Disable IndentationWidth cop for false positive around here document
Force :should syntax with rspec-mock in spec_helper.rb
Extract be_close specific logic to BeClose
Support BeClose in Rewriter