Add string-escape per email from the author

xach · xach · commit 699facb73fb1 · 2015-03-28T12:54:25.000-04:00
diff --git a/string-escape/source.txt b/string-escape/source.txt
@@ -0,0 +1 @@
+http http://people.csail.mit.edu/devon/lisp/string-escape.tgz

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+http http://people.csail.mit.edu/devon/lisp/string-escape.tgz`