Remove spaces from searched text

PDF::Reader::PageTextReceiver removes spaces from runs.
https://github.com/yob/pdf-reader/blob/v2.9.1/lib/pdf/reader/page_text_receiver.rb#L141
The easy solution for now is to remove spaces from searched strings.
Another solution may be to create a custom PageTextReceiver to keep
spaces.

lib/pdf/reader/find_text.rb

@@ -6,6 +6,8 @@ require_relative "find_text/version"
 
 module PDF::Reader::FindText
   def find_text(text)
+    text = text.tr(' ', '')
+
     runs(merge: false).each_cons(text.size).select do |r|
       r.map(&:text).join == text
     end.map do |r|