getting rid of double spaces

bibtexbrowser-test.php

@@ -500,7 +500,7 @@ class BTBTest extends PHPUnit_Framework_TestCase {
         $this->assertEquals("Meyer, Heribert", $authors[0]);
         $this->assertEquals("Advanced Air and Ground Research Team", $authors[1]);
         $this->assertEquals("Foo Bar", $authors[2]);
-        $this->assertEquals("Meyer, Heribert, Advanced Air and Ground Research Team,  and Foo Bar", $entry->getFormattedAuthorsString());
+        $this->assertEquals("Meyer, Heribert, Advanced Air and Ground Research Team, and Foo Bar", $entry->getFormattedAuthorsString());
 
         // test with formatting (first name before)
         bibtexbrowser_configure('USE_COMMA_AS_NAME_SEPARATOR_IN_OUTPUT', true);
@@ -509,7 +509,7 @@ class BTBTest extends PHPUnit_Framework_TestCase {
         $this->assertEquals("Meyer, Heribert", $authors[0]);
         $this->assertEquals("Team, Advanced Air and Ground Research", $authors[1]);
         $this->assertEquals("Bar, Foo", $authors[2]);
-        $this->assertEquals("Meyer, Heribert; Team, Advanced Air and Ground Research;  and Bar, Foo", $entry->getFormattedAuthorsString());
+        $this->assertEquals("Meyer, Heribert; Team, Advanced Air and Ground Research; and Bar, Foo", $entry->getFormattedAuthorsString());
 
         // test with formatting (with initials) formatAuthorInitials
         bibtexbrowser_configure('USE_COMMA_AS_NAME_SEPARATOR_IN_OUTPUT', false);
@@ -519,7 +519,7 @@ class BTBTest extends PHPUnit_Framework_TestCase {
         $this->assertEquals("Meyer H", $authors[0]);
         $this->assertEquals("Team AAand GR", $authors[1]);
         $this->assertEquals("Bar F", $authors[2]);
-        $this->assertEquals("Meyer H, Team AAand GR,  and Bar F", $entry->getFormattedAuthorsString());
+        $this->assertEquals("Meyer H, Team AAand GR, and Bar F", $entry->getFormattedAuthorsString());
 
         // test with first_name last_name formatAuthorCanonical
         bibtexbrowser_configure('USE_COMMA_AS_NAME_SEPARATOR_IN_OUTPUT', false);
@@ -530,7 +530,7 @@ class BTBTest extends PHPUnit_Framework_TestCase {
         $this->assertEquals("Heribert Meyer", $authors[0]);
         $this->assertEquals("Advanced Air and Ground Research Team", $authors[1]);
         $this->assertEquals("Foo Bar", $authors[2]);
-        $this->assertEquals("Heribert Meyer, Advanced Air and Ground Research Team,  and Foo Bar", $entry->getFormattedAuthorsString());
+        $this->assertEquals("Heribert Meyer, Advanced Air and Ground Research Team, and Foo Bar", $entry->getFormattedAuthorsString());
         
         // test there is no Oxford comma for only two authors with default options
         bibtexbrowser_configure('USE_COMMA_AS_NAME_SEPARATOR_IN_OUTPUT', false);
@@ -766,11 +766,11 @@ class BTBTest extends PHPUnit_Framework_TestCase {
         $btb->load('bibacid-utf8.bib');
         $this->assertEquals(4,count($btb->bibdb['arXiv-1807.05030']->getRawAuthors()));
         $this->assertEquals(4,count($btb->bibdb['arXiv-1807.05030']->getFormattedAuthorsArray()));
-        $this->assertEquals("Oscar Luis Vera-Pérez, Benjamin Danglot, Martin Monperrus,  and Benoit Baudry",$btb->bibdb['arXiv-1807.05030']->getAuthor());
+        $this->assertEquals("Oscar Luis Vera-Pérez, Benjamin Danglot, Martin Monperrus, and Benoit Baudry",$btb->bibdb['arXiv-1807.05030']->getAuthor());
 
         bibtexbrowser_configure('BIBTEXBROWSER_LINK_STYLE','nothing');
         bibtexbrowser_configure('BIBLIOGRAPHYSTYLE','JanosBibliographyStyle');
-        $this->assertEquals("Oscar Luis Vera-Pérez, Benjamin Danglot, Martin Monperrus,  and Benoit Baudry,  \"A Comprehensive Study of Pseudo-tested Methods\", Technical report, arXiv 1807.05030, 2018.\n ",strip_tags($btb->bibdb['arXiv-1807.05030']->toHTML()));
+        $this->assertEquals("Oscar Luis Vera-Pérez, Benjamin Danglot, Martin Monperrus, and Benoit Baudry,  \"A Comprehensive Study of Pseudo-tested Methods\", Technical report, arXiv 1807.05030, 2018.\n ",strip_tags($btb->bibdb['arXiv-1807.05030']->toHTML()));
 
     }
 

bibtexbrowser.php

@@ -1571,8 +1571,10 @@ class BibEntry {
       $result .= $authors[$i].$sep;
     }
     $lastAuthorSeperator = bibtexbrowser_configuration('LAST_AUTHOR_SEPARATOR');
+    // add Oxford comma if there are more than 2 authors
     if (count($authors)>2) {
       $lastAuthorSeperator = $sep.$lastAuthorSeperator;
+      $lastAuthorSeperator = preg_replace("/ {2,}/", " ", $lastAuthorSeperator);
     }
     $result .= $authors[count($authors)-2].$lastAuthorSeperator.$authors[count($authors)-1];
     return $result;