Rename to_string to inspect

And provide a stupid to_string implementation

Extension.pm

@@ -21,7 +21,7 @@ sub filter {
     return $resource->name =~ /$re/;
 }
 
-sub to_string {
+sub inspect {
     my ( $self ) = @_;
 
     my $re = ${$self};

Filter.pm

@@ -102,9 +102,29 @@ sub is_inverted {
     return 0;
 }
 
+=head2 $filter->to_string
+
+Converts the filter to a string.  This method is also
+called implicitly by stringification.
+
+=cut
+
 sub to_string {
     my ( $self ) = @_;
 
+    return "(unimplemented to_string)";
+}
+
+=head2 $filter->inspect
+
+Prints a human-readable debugging string for this filter.  Useful for,
+you guessed it, debugging.
+
+=cut
+
+sub inspect {
+    my ( $self ) = @_;
+
     return ref($self);
 }
 

FirstLineMatch.pm

@@ -28,7 +28,7 @@ sub filter {
     return /$re/;
 }
 
-sub to_string {
+sub inspect {
     my ( $self ) = @_;
 
     my $re = ${$self};

Inverse.pm

@@ -27,7 +27,7 @@ sub is_inverted {
     return 1;
 }
 
-sub to_string {
+sub inspect {
     my ( $self ) = @_;
 
     my $filter = ${$self};

Is.pm

@@ -21,7 +21,7 @@ sub filter {
     return $base eq $filename;
 }
 
-sub to_string {
+sub inspect {
     my ( $self ) = @_;
 
     my $filename = ${$self};

Match.pm

@@ -24,7 +24,7 @@ sub filter {
     return $base =~ /$re/;
 }
 
-sub to_string {
+sub inspect {
     my ( $self ) = @_;
 
     my $re = ${$self};