replace in opening quotations

node67.html

@@ -88,11 +88,11 @@ called the
 <A NAME="4711"></A><I>parent</I>.
 
 <P>
-If you type ``pd" or ``pd my-name" into an object box, this creates a one-off
+If you type "pd" or "pd my-name" into an object box, this creates a one-off
 subpatch.  The contents of the subpatch are saved as part of the parent patch,
 in one file. If you make several copies of a subpatch you may change them
 individually.  On the other hand, you can invoke an abstraction by typing into
-the box the name of a Pd patch saved to a file (without the ``.pd" extension).
+the box the name of a Pd patch saved to a file (without the ".pd" extension).
 In this situation Pd will read that file into the subpatch.  In this way,
 changes to the file propagate everywhere the abstraction is invoked.
 
@@ -141,11 +141,11 @@ comes to the inlet of the box in the parent patch comes out of the
 
 <P>
 Pd provides an argument-passing mechanism so that you can parametrize different
-invocations of an abstraction.  If in an object box you type ``$1",
-it is expanded to mean ``the first creation argument in my box on the
-parent patch", and similarly for ``$2" and so on.  The text in
+invocations of an abstraction.  If in an object box you type "$1",
+it is expanded to mean "the first creation argument in my box on the
+parent patch", and similarly for "$2" and so on.  The text in
 an object box is interpreted at the time the box is created, unlike the
-text in a message box.  In message boxes, the same ``$1" means ``the
+text in a message box.  In message boxes, the same "$1" means "the
 first argument of the message I just received" and is interpreted whenever
 a new message comes in.
 
@@ -164,7 +164,7 @@ and 5.
 Pd's abstraction mechanism: (a) invoking the abstraction,
 <TT>plusminus</TT> with 5 as a creation argument; (b) the contents of the
 file,
-``plusminus.pd".</CAPTION>
+"plusminus.pd".</CAPTION>
 <TR><TD><IMG
  WIDTH="353" HEIGHT="134" BORDER="0"
  SRC="img378.png"
@@ -174,10 +174,10 @@ file,
 
 <P>
 The <TT>plusminus</TT> object is not defined by Pd, but is rather defined
-by the patch residing in the file named ``plusminus.pd".  This patch is shown
+by the patch residing in the file named "plusminus.pd".  This patch is shown
 in part (b) of the figure.  The one <TT>inlet</TT> and 
 two <TT>outlet</TT> objects correspond to the inlets and outlets of
-the <TT>plusminus</TT> object.  The two ``$1" arguments (to the
+the <TT>plusminus</TT> object.  The two "$1" arguments (to the
 <TT>+</TT> and <TT>-</TT>  objects) are replaced by 5 (the creation argument of the
 <TT>plusminus</TT> object).