Lexing of # in Elixir lexer

[pyrmont]

Name of the lexer
Elixir

Code sample
A sample of the code that produces the bug.

"#hello world"

Additional context
This bug was discovered when reviewing the EEX lexer submission (#874). The problem is here:

rouge/lib/rouge/lexers/elixir.rb

Lines 80 to 83 in 59624c1

	state :enddoublestr do
	mixin :interpoling
	rule %r/[^#"]+/, Str::Double
	end