Fixed Makefile: root file name for dependency graph, and typo in scribble file.

graph-lib/make/make.rkt

@@ -152,7 +152,7 @@
 (begin
   (run! (list (find-executable-path-or-fail "racket")
               "make/dependency-graph.rkt"
-              "graph/__DEBUG_graph__.rkt"
+              "main.rkt"
               "docs/deps.dot"))
   
   (run! (list (find-executable-path-or-fail "dot")
@@ -241,7 +241,7 @@
     echo "(";
     raco show-dependencies \
       -x typed/racket -x racket/base -x racket \
-      -g graph/__DEBUG_graph__.rkt;
+      -g main.rkt;
       echo ")"
   ) \
   | racket -e '

graph-lib/web/index.scrbl

@@ -8,7 +8,7 @@
  @remote-image["https://img.shields.io/travis/jsmaniac/phc.svg"]{
   Build Status}}
 @hyperlink["https://coveralls.io/github/jsmaniac/phc?branch=master"]{
- @remote-image["https://img.shields.io/coveralls/jsmaniac/phc.svg")]{
+ @remote-image["https://img.shields.io/coveralls/jsmaniac/phc.svg"]{
   Coverage Status}}
 
 @;@(table-of-contents)