txt2man: migrate to boneyard

Closes #4104.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/txt2man.rb

@@ -1,49 +0,0 @@
-class Txt2man < Formula
-  desc "Convert flat ASCII text to man page format"
-  homepage "https://github.com/mvertes/txt2man"
-  url "https://github.com/mvertes/txt2man/archive/txt2man-1.5.6.tar.gz"
-  sha256 "df9d972c6930576328b779e64aed6d3e0106118e5a4069172f06db290f32586a"
-  head "https://github.com/mvertes/txt2man.git"
-
-  bottle do
-    cellar :any_skip_relocation
-    sha256 "b21b275a37f0f8fd3623e3c5590326737f448f9cc2dd9f24556021d2326fef6c" => :el_capitan
-    sha256 "d3831605b2d3c5b40dcc9f9a24ab875015c399da283b09f4de61161752b7e590" => :yosemite
-    sha256 "b456aee5d116f56b8c0792f904f1c44b437d8ded3a3fa0409fa12ca897020233" => :mavericks
-  end
-
-  depends_on "gawk"
-
-  def install
-    inreplace "Makefile", "$(prefix)/man/man1", man1
-    system "make", "install", "prefix=#{prefix}"
-  end
-
-  test do
-    # txt2man
-    (testpath/"test.txt").write <<-EOS.undent
-      A TITLE
-
-      blah blah blah
-    EOS
-
-    assert_match(/\.SH A TITLE/, shell_output("#{bin}/txt2man test.txt"))
-
-    # src2man
-    (testpath/"test.c").write <<-EOS.undent
-      #include <stdio.h>
-
-      /** 3
-      * main - do stuff
-      **/
-      int main(void) { return 0; }
-    EOS
-
-    assert_equal "main.3\n", shell_output("#{bin}/src2man test.c 2>&1")
-    assert_match(/\\fBmain\ \\fP\-\ do\ stuff\n/, File.read("main.3").lines.to_a[4])
-
-    # bookman
-    system "#{bin}/bookman", "-t", "Test", "-o", "test", Dir["#{man1}/*"]
-    assert File.exist?("test")
-  end
-end

tap_migrations.json

@@ -278,6 +278,7 @@
   "ttytter": "homebrew/boneyard",
   "tuntap": "caskroom/cask",
   "tup": "homebrew/fuse",
+  "txt2man": "homebrew/boneyard",
   "ucspi-tools": "homebrew/boneyard",
   "uim": "homebrew/x11",
   "ume": "homebrew/games",