--- a/handouts/ho01.tex	Fri Dec 05 01:00:34 2014 +0000
+++ b/handouts/ho01.tex	Fri Dec 05 17:13:33 2014 +0000
@@ -69,7 +69,7 @@
 disposable.style.email.with+symbol@example.com
 \end{lstlisting}
 
-Identifiers, or variables, in program text are often required
+As mentioned above, identifiers, or variables, in program text are often required
 to satisfy the constraints that they start with a letter and
 then can be followed by zero or more letters or numbers and
 also can include underscores, but not as the first character.
@@ -118,7 +118,8 @@
 \ref{crawler3}.\footnote{There is an interesting twist in the
 web-scraper where \pcode{re*?} is used instead of
 \pcode{re*}.} Note, however, the regular expression for
-http-addresses in web-pages is meant to be
+http-addresses in web-pages in Figure~\ref{crawler1}, Line 15, is 
+intended to be
 
 \[
 \pcode{"https?://[^"]*"}
@@ -162,7 +163,7 @@
     scaled ticks=false,
     axis lines=left,
     width=7cm,
-    height=5cm, 
+    height=4.5cm, 
     legend entries={Python,Ruby},  
     legend pos=north west,
     legend cell align=left]
@@ -217,7 +218,7 @@
     scaled ticks=false,
     axis lines=left,
     width=9cm,
-    height=5cm]
+    height=4.5cm]
 \addplot[green,mark=square*,mark options={fill=white}] table {re2b.data};
 \addplot[black,mark=square*,mark options={fill=white}] table {re3.data};
 \end{axis}
@@ -393,6 +394,8 @@
 between the different regular expressions $(r_1 + r_2) + r_3$
 and $r_1 + (r_2 + r_3)$\ldots they are not the same regular
 expression, but they have the same meaning. For example
+you can do the following calculation which shows they
+have the same meaning:
 
 \begin{eqnarray*}
 L((r_1 + r_2) + r_3) & = & L(r_1 + r_2) \cup L(r_3)\\
@@ -517,7 +520,7 @@
 specification and that the corresponding implementations do
 not contain any bugs. We are close, but not yet quite there.
 
-Despite my fascination, I am also happy to admit that regular
+My fascination non withstanding, I am also happy to admit that regular
 expressions have their shortcomings. There are some well-known
 ``theoretical'' shortcomings, for example recognising strings
 of the form $a^{n}b^{n}$. I am not so bothered by them. What I