Add Perltidy test in xt (related to #319)

- Add cpanfile, specifying dependencies for running the xt tests
  (authors tests, not installation tests)

Makefile.am

@@ -58,7 +58,8 @@ noinst_SCRIPTS = \
 	xt/fixme.t \
 	xt/fixme-todo.t \
 	xt/pod-coverage.t \
-	xt/pod-spelling.t
+	xt/pod-spelling.t \
+	xt/perltidy.t
 
 EXTRA_DIST = \
 	AUTHORS.md \

cpanfile

+on 'develop' => sub {
+    requires 'Test::Fixme';
+    requires 'Test::PerlTidy';
+};

doc/dot.perltidyrc

@@ -6,7 +6,7 @@
 -cti=0 # No extra indentation for closing brackets
 -i=4   # Indent level is 4 cols
 -ci=4  # Continuation indent is 4 cols
--l=78  # Max line witdh is 78 cols
+-l=78  # Max line width is 78 cols
 -nolc  # Don't outdent long comments (* -olc)
 -nolq  # Don't outdent long quoted strings
 -nsbl  # No opening sub brace on new line (* -sbl)

xt/perltidy.t

+use strict;
+use warnings;
+
+use Test::PerlTidy;
+use FindBin qw($Bin);
+
+run_tests(
+    path       => "$Bin/../src/",
+    perltidyrc => "$Bin/../doc/dot.perltidyrc"
+);