ncurses package builds ncurses and ncursesw (#3953)

* ncurses package will build ncurses and ncursesw

* Added libs property to ncurses, added fix for hstr

* flake8 is a harsh mistress

* make libs() more robust

* atop depends on ncurses

* fish depends on ncurses

* libtermkey and nano depend on ncurses

* Adjust url spacing

var/spack/repos/builtin/packages/fish/package.py

@@ -34,4 +34,6 @@ class Fish(AutotoolsPackage):
     url      = "http://fishshell.com/files/2.2.0/fish-2.2.0.tar.gz"
     list_url = "http://fishshell.com/"
 
+    depends_on('ncurses')
+
     version('2.2.0', 'a76339fd14ce2ec229283c53e805faac48c3e99d9e3ede9d82c0554acfc7b77a')