Fix collection of external entities depending on line ending

[angelozerr]

Fix collection of external entities depending on line ending (second try)

See redhat-developer/vscode-xml#262 (comment)

Signed-off-by: azerr azerr@redhat.com

[angelozerr]

This PR fix problem (again) with entity hyperlink.

Create this the base.dtd file like this (with some indentation):

              <!ENTITY external3 "A B"><!ENTITY external5 "A B">
                    <!ENTITY external4 "A B">     	
<!ELEMENT root-element (#PCDATA)>
				 	<!ENTITY external "A B">               
<!ENTITY external2 "EXTERNALLY DECLARED ENTITY">

Create this XML file:

<?xml version="1.0" standalone="no"?>
<!DOCTYPE root-element SYSTEM "base.dtd" [
	<!ENTITY local "LOCALLY DECLARED ENTITY">
]>   
<root-element>
&local;    
&external3;   
&external;   
&external4;
&external5;  
&external2;
&undeclared;
</root-element>

Try to go to the definition of &external5; and other, it should work (In master it doesn't work).

[angelozerr]

Tests are written now.