Fixed blog link in read-me and commented out experimental -x option for now.

readme.md

@@ -138,6 +138,7 @@ To test with multiple shells in sequence, use something like:
       urchin -s $shell ./tests
     done
 
+<!--
 #### (c) Cross shell tests with `urchin -x` (experimental)
 If you run urchin with the `-x` flag, it will be as if you ran
 `$TEST_SHELL`. Unless `$TEST_SHELL` isn't set, in which case it'll
@@ -151,7 +152,7 @@ It might make sense if you do this.
 
     export TEST_SHELL=zsh && urchin -x
     export TEST_SHELL=bash && urchin -x
-
+-->
 ## Alternatives to Urchin
 Alternatives to Urchin are discussed in
-[this blog post](https://blog.tlevine.com/2012/12/how-to-test-shell-scripts/).
+[this blog post](https://blog.scraperwiki.com/2012/12/how-to-test-shell-scripts/).

urchin

@@ -107,14 +107,15 @@ $USAGE
             have shebang line "#!/bin/sh" with the specified shell.
 -f          Force running even if the test directory's name does not
             contain the word "test".
--x          [Experimental; not meant for direct invocation, but for use in
-            the shebang line of test scripts]
-            Run with "\$TEST_SHELL", falling back on /bin/sh.
 -h          This help.
 
 Go to https://github.com/tlevine/urchin for documentation on writing tests.
 
 EOF
+  # [Experimental -x option left undocumented for now.]
+  # -x          [Experimental; not meant for direct invocation, but for use in
+  #             the shebang line of test scripts]
+  #             Run with "\$TEST_SHELL", falling back on /bin/sh.
 }
 
 plural () {
@@ -182,7 +183,7 @@ do
           shell_for_sh_tests=$1
           which "$shell_for_sh_tests" >/dev/null || { echo "Cannot find specified shell: '$shell_for_sh_tests'" >&2; urchin_help >&2; exit 2; }
           ;;
-        -x) # `urchin -x <test-script>` is equivalent to `"$TEST_SHELL" <test-script>`
+        -x) # [EXPERIMENTAL; UNDOCUMENTED FOR NOW] `urchin -x <test-script>` in a test script's shebang line is equivalent to invoking that script with `"$TEST_SHELL" <test-script>`
           shift
           urchinsh=${TEST_SHELL:-/bin/sh}
           "$urchinsh" "$@"