test: add use strict and use warnings to test files

t/bare_glob_filehandle.t

@@ -1,6 +1,7 @@
+use strict;
+use warnings;
 use Test::More tests => 2;
 use XML::Parser;
-use strict;
 
 # Test that bare glob filehandles (*FH) work with parse().
 # See https://github.com/cpan-authors/XML-Parser/issues/201

t/current_byte.t

@@ -1,3 +1,5 @@
+use strict;
+use warnings;
 use Test::More tests => 4;
 use XML::Parser;
 

t/file.t

@@ -1,10 +1,11 @@
-
+use strict;
+use warnings;
 use Test::More tests => 1;
 use XML::Parser;
 
 my $count = 0;
 
-$parser = XML::Parser->new( ErrorContext => 2 );
+my $parser = XML::Parser->new( ErrorContext => 2 );
 $parser->setHandlers( Comment => sub { $count++; } );
 
 $parser->parsefile('samples/REC-xml-19980210.xml');

t/file_open_scalar.t

@@ -1,5 +1,6 @@
-
-use if $] < 5.006, Test::More => skip_all => 'syntax requires perl 5.6';
+use strict;
+use warnings;
+use if $] < 5.006, 'Test::More' => skip_all => 'syntax requires perl 5.6';
 
 #tests behaviour on perls 5.10? .. 5.10.1
 package Some::Fake::Packege;
@@ -12,7 +13,6 @@ package main;
 
 use Test::More tests => 1;
 use XML::Parser;
-use strict;
 
 my $count = 0;
 

t/memory_leak_symtab.t

@@ -1,6 +1,7 @@
+use strict;
+use warnings;
 use Test::More tests => 4;
 use XML::Parser;
-use strict;
 
 # Test that parsing XML strings does not auto-vivify symbol table entries.
 # See https://github.com/cpan-authors/XML-Parser/issues/27

t/parsefile_base_restore.t

@@ -1,3 +1,5 @@
+use strict;
+use warnings;
 use Test::More tests => 3;
 use XML::Parser;
 

t/position_overflow.t

@@ -1,3 +1,5 @@
+use strict;
+use warnings;
 use Test::More tests => 9;
 use XML::Parser;
 

t/subs_inherited.t

@@ -1,3 +1,5 @@
+use strict;
+use warnings;
 use Test::More tests => 4;
 use XML::Parser;
 

t/tree_entity_expand.t

@@ -1,3 +1,5 @@
+use strict;
+use warnings;
 use Test::More tests => 7;
 use XML::Parser;