5 files changed, 5 insertions, 20 deletions
diff --git a/IkiWiki/Plugin/bzr.pm b/IkiWiki/Plugin/bzr.pm
index 39227cbae..99025a973 100644
--- a/IkiWiki/Plugin/bzr.pm
+++ b/IkiWiki/Plugin/bzr.pm
@@ -23,9 +23,6 @@ sub import { #{{{
 } #}}}
 
 sub checkconfig () { #{{{
-	if (! defined $config{diffurl}) {
-		$config{diffurl}="";
-	}
 	if (defined $config{bzr_wrapper} && length $config{bzr_wrapper}) {
 		push @{$config{wrappers}}, {
 			wrapper => $config{bzr_wrapper},
@@ -225,7 +222,7 @@ sub rcs_recentchanges ($) { #{{{
 			# Skip source name in renames
 			$filename =~ s/^.* => //;
 
-			my $diffurl = $config{'diffurl'};
+			my $diffurl = defined $config{'diffurl'} ? $config{'diffurl'} : "";
 			$diffurl =~ s/\[\[file\]\]/$filename/go;
 			$diffurl =~ s/\[\[file-id\]\]/$fileid/go;
 			$diffurl =~ s/\[\[r2\]\]/$info->{revno}/go;
diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index b20793d86..5e302729e 100644
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -26,9 +26,6 @@ sub import { #{{{
 } #}}}
 
 sub checkconfig () { #{{{
-	if (! defined $config{diffurl}) {
-		$config{diffurl}="";
-	}
 	if (! defined $config{gitorigin_branch}) {
 		$config{gitorigin_branch}="origin";
 	}
@@ -472,7 +469,7 @@ sub rcs_recentchanges ($) { #{{{
 		foreach my $detail (@{ $ci->{'details'} }) {
 			my $file = $detail->{'file'};
 
-			my $diffurl = $config{'diffurl'};
+			my $diffurl = defined $config{'diffurl'} ? $config{'diffurl'} : "";
 			$diffurl =~ s/\[\[file\]\]/$file/go;
 			$diffurl =~ s/\[\[sha1_parent\]\]/$ci->{'parent'}/go;
 			$diffurl =~ s/\[\[sha1_from\]\]/$detail->{'sha1_from'}/go;
diff --git a/IkiWiki/Plugin/mercurial.pm b/IkiWiki/Plugin/mercurial.pm
index 738be8c32..d2c34fa6a 100644
--- a/IkiWiki/Plugin/mercurial.pm
+++ b/IkiWiki/Plugin/mercurial.pm
@@ -23,9 +23,6 @@ sub import { #{{{
 } #}}}
 
 sub checkconfig () { #{{{
-	if (! defined $config{diffurl}) {
-		$config{diffurl}="";
-	}
 	if (exists $config{mercurial_wrapper} && length $config{mercurial_wrapper}) {
 		push @{$config{wrappers}}, {
 			wrapper => $config{mercurial_wrapper},
@@ -199,7 +196,7 @@ sub rcs_recentchanges ($) { #{{{
 		}
 
 		foreach my $file (split / /,$info->{files}) {
-			my $diffurl = $config{'diffurl'};
+			my $diffurl = defined $config{diffurl} ? $config{'diffurl'} : "";
 			$diffurl =~ s/\[\[file\]\]/$file/go;
 			$diffurl =~ s/\[\[r2\]\]/$info->{changeset}/go;
 
diff --git a/IkiWiki/Plugin/svn.pm b/IkiWiki/Plugin/svn.pm
index 05312a1ed..51683704c 100644
--- a/IkiWiki/Plugin/svn.pm
+++ b/IkiWiki/Plugin/svn.pm
@@ -22,9 +22,6 @@ sub import { #{{{
 } #}}}
 
 sub checkconfig () { #{{{
-	if (! defined $config{diffurl}) {
-		$config{diffurl}="";
-	}
 	if (! defined $config{svnpath}) {
 		$config{svnpath}="trunk";
 	}
@@ -318,7 +315,7 @@ sub rcs_recentchanges ($) { #{{{
 				$file=$1;
 			}
 
-			my $diffurl=$config{diffurl};
+			my $diffurl=defined $config{diffurl} ? $config{diffurl} : "";
 			$diffurl=~s/\[\[file\]\]/$file/g;
 			$diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
 			$diffurl=~s/\[\[r2\]\]/$rev/g;
diff --git a/IkiWiki/Plugin/tla.pm b/IkiWiki/Plugin/tla.pm
index b95c1a522..6faaecccc 100644
--- a/IkiWiki/Plugin/tla.pm
+++ b/IkiWiki/Plugin/tla.pm
@@ -21,9 +21,6 @@ sub import { #{{{
 } #}}}
 
 sub checkconfig () { #{{{
-	if (! defined $config{diffurl}) {
-		$config{diffurl}="";
-	}
 	if (defined $config{tla_wrapper} && length $config{tla_wrapper}) {
 		push @{$config{wrappers}}, {
 			wrapper => $config{tla_wrapper},
@@ -215,7 +212,7 @@ sub rcs_recentchanges ($) {
 		my @pages;
 
 		foreach my $file (@paths) {
-			my $diffurl=$config{diffurl};
+			my $diffurl=defined $config{diffurl} ? $config{diffurl} : "";
 			$diffurl=~s/\[\[file\]\]/$file/g;
 			$diffurl=~s/\[\[rev\]\]/$change/g;
 			push @pages, {