nkf 2.1.3

Also use inreplace and make variables to avoid needing a patch.

Fixes Homebrew/homebrew#24860.

Formula/nkf.rb

@@ -2,58 +2,14 @@ require 'formula'
 
 class Nkf < Formula
   homepage 'http://sourceforge.jp/projects/nkf/'
-  url 'http://dl.sourceforge.jp/nkf/53171/nkf-2.1.2.tar.gz'
-  sha1 'ca301d84e57787f566c933c2a1511f600183c8f1'
-
-  def patches
-    # Makefile patch
-    DATA
-  end
+  url 'http://dl.sourceforge.jp/nkf/59912/nkf-2.1.3.tar.gz'
+  sha1 'cb491b63b1a984dd6015e4946ac9579de132be6f'
 
   def install
-    ENV['prefix'] = prefix
-    system 'make'
-    system 'make install'
+    inreplace 'Makefile', "$(prefix)/man", "$(prefix)/share/man"
+    system 'make', "CC=#{ENV.cc}"
+    # Have to specify mkdir -p here since the intermediate directories
+    # don't exist in an empty prefix
+    system "make", "install", "prefix=#{prefix}", "MKDIR=mkdir -p"
   end
 end
-
-__END__
-diff --git a/Makefile b/Makefile
---- a/Makefile
-+++ b/Makefile
-@@ -1,4 +1,4 @@
--CC = cc
-+#CC = cc
- CFLAGS = -g -O2 -Wall -pedantic
- # CFLAGS = -O3
- SHAR = shar 
-@@ -7,7 +7,7 @@
- RM = rm -rf
- VERSION = 2.1.2
- MKDIR = mkdir
--prefix = /usr/local
-+#prefix = /usr/local
- 
- .PHONY: clean install test tar shar
- 
-@@ -35,13 +35,14 @@
- 
- install:
- 	-$(MKDIR) $(prefix)/bin
--	-$(MKDIR) $(prefix)/man
--	-$(MKDIR) $(prefix)/man/man1
--	-$(MKDIR) $(prefix)/man/ja
--	-$(MKDIR) $(prefix)/man/ja/man1
-+	-$(MKDIR) $(prefix)/share
-+	-$(MKDIR) $(prefix)/share/man
-+	-$(MKDIR) $(prefix)/share/man/man1
-+	-$(MKDIR) $(prefix)/share/man/ja
-+	-$(MKDIR) $(prefix)/share/man/ja/man1
- 	cp -f nkf $(prefix)/bin/
--	cp -f nkf.1 $(prefix)/man/man1/
--	cp -f nkf.1j $(prefix)/man/ja/man1/nkf.1
-+	cp -f nkf.1 $(prefix)/share/man/man1/
-+	cp -f nkf.1j $(prefix)/share/man/ja/man1/nkf.1
- 
- shar:
- 	-mkdir nkf-$(VERSION)