M Makefile → Makefile

@@ -4,4 +4,9 @@ TARG=github.com/russross/blackfriday
 
 GOFILES=markdown.go html.go smartypants.go
 
+package:
+
 include $(GOROOT)/src/Make.pkg
+
+markdown: package
+	make -C example

A README.md

@@ -0,0 +1,59 @@
+Black Friday
+============
+
+This is an implementation of John Gruber's [markdown][1] in [Go][2].
+It is a translation of the [upskirt][3] library written in C with a
+few minor changes. It retains the paranoia of the original (it is
+careful not to trust its input, and as such it should be safe to
+feed it arbitrary user-supplied inputs). It also retains the
+emphasis on high performance, and the source is almost as ugly as
+the original.
+
+HTML output is currently supported, along with Smartpants
+extensions.
+
+
+Installation
+------------
+
+Assuming you have recent version of Go installed, along with git:
+
+    goinstall github.com/russross/blackfriday
+
+will download, compile, and install the package into
+`$GOROOT/src/pkg/github.com/russross/blackfriday`.
+
+Check out `example/main.go` for an example of how to use it. Run
+`gomake` in that directory to build a simple command-line markdown
+tool:
+
+    cd $GOROOT/src/pkg/github.com/russross/blackfriday
+    gomake markdown
+
+will build the binary `markdown` in the `example` directory.
+
+
+Extensions
+----------
+
+In addition to the extensions offered by upskirt, this package
+implements two additional Smartypants options:
+
+*   LaTeX-style dash parsing, where `--` is translated into
+    `–`
+*   Generic fractions, where anything that looks like a fraction
+    is translated into suitable HTML (instead of just a few special
+    cases). For example, `4/5` becomes `<sup>4</sup>&frasl;<sub>5</sub>`
+
+
+Todo
+----
+
+*   Code cleanup
+*   Better code documentation
+*   Implement a LaTeX backend
+
+
+   [1]: http://daringfireball.net/projects/markdown/ "Markdown"
+   [2]: http://golang.org/ "Go Language"
+   [3]: http://github.com/tanoku/upskirt "Upskirt"

M smartypants.go → smartypants.go

@@ -231,9 +231,11 @@ if den_end == num_end+1 {
 			return 0
 		}
 		if len(text) == den_end || word_boundary(text[den_end]) {
+			ob.WriteString("<sup>")
 			ob.Write(text[:num_end])
-			ob.WriteString("&frasl;")
+			ob.WriteString("</sup>&frasl;<sub>")
 			ob.Write(text[num_end+1 : den_end])
+			ob.WriteString("</sub>")
 			return den_end - 1
 		}
 	}