fix english punctuation for dialogs

songs/avenue_q/the_internet_is_for_porn.sg

@@ -27,13 +27,13 @@
   \end{chorus}
 
   \begin{verse*}
-    ``Treekkie!
-    --- Oh hello Kate Monster!
-    --- You are ruining my song
-    --- Oh me sorry, me no mean to
-    --- Well if you wouldn't mind please being quiet for a minute so I can finish?
-    --- Oki doki
-    --- Good''
+    ``Treekkie!''
+    ``Oh hello Kate Monster!''
+    ``You are ruining my song''
+    ``Oh me sorry, me no mean to''
+    ``Well if you wouldn't mind please being quiet for a minute so I can finish?''
+    ``Oki doki''
+    ``Good''
   \end{verse*}
 
   \begin{verse}
@@ -52,14 +52,14 @@
   \end{chorus}
 
   \begin{verse*}
-    ``That's gross, you're a pervert
-    --- Ah, sticks and stones Kate monster
-    --- No really, you're a pervert. Normal people don't sit at home and look at porn on the Internet
-    --- Oh?
-    --- What?
-    --- You have no idea! Ready normal people?
-    --- Ready. Ready. Ready
-    --- Let me hear it!''
+    ``That's gross, you're a pervert!''
+    ``Ah, sticks and stones Kate monster.''
+    ``No really, you're a pervert. Normal people don't sit at home and look at porn on the Internet.''
+    ``Oh?''
+    ``What?''
+    ``You have no idea! Ready normal people?''
+    ``Ready. Ready. Ready!''
+    ``Let me hear it!''
   \end{verse*}
 
   \begin{chorus}
@@ -70,15 +70,15 @@
   \end{chorus}
 
   \begin{verse*}
-    ``The Internet is not for porn!
-    --- Porn, Porn, P\dots
-    --- Hold on a second!
+    ``The Internet is not for porn!''
+    ``Porn, Porn, P\dots''
+    ``Hold on a second!
     Now I know for a fact that you, Rob, check your portfolio and trade stocks online \echo{That's correct}
     And Brian, you buy things on amazon.com \echo{Sure!}
     And Gary, you keep selling your possessions on eBay \echo{Yes I do!}
-    And Princeton, you sent me that sweet online birthday card \echo{True!}
-    --- Oh, but Kate, what you think he do \dots after? Hmm? \echo{Yeah!}
-    --- Eeewwwww!''
+    And Princeton, you sent me that sweet online birthday card'' \echo{True!}
+    ``Oh, but Kate, what you think he do \dots after? Hmm?'' \echo{Yeah!}
+    ``Eeewwwww!''
   \end{verse*}
 
   \begin{chorus}

songs/johnny_cash/jackson.sg

@@ -34,8 +34,8 @@
   \begin{chorus}
     Yeah, go to Jackson
     Go comb your hair!
-    ``Honey, I'm gonna snowball Jackson
-    --- See if I care''
+    ``Honey, I'm gonna snowball Jackson''
+    ``See if I care''
   \end{chorus}
 
   \begin{verse}