DRY up line-indent styles for poetry

Also add the .poem class to the attribute selector. Note the TODO
regarding what this does to lines of poetry that might include italics.

Author: karlstolley

_sass/_ed.scss

@@ -670,7 +670,9 @@ ul.poetry {
 
 
 /* This snippet helps us reset the margin for all spans with the indent- class */
-.poetry span[class^='indent-']{
+.poem span[class^='indent-'],
+.poetry span[class^='indent-'] {
+  font-style: normal; /* TODO: what if poetry lines include italic? */
   margin: 0;/* reset browsers default margin styles*/
 }
 
@@ -681,52 +683,42 @@ ul.poetry {
 */
 
 .indent-1 {
-  font-style: normal;
   padding-left: 1rem;
 }
 
 .indent-2 {
-  font-style: normal;
   padding-left: 2rem;
 }
 
 .indent-3 {
-  font-style: normal;
   padding-left: 3rem;
 }
 
 .indent-4 {
-  font-style: normal;
   padding-left: 4rem;
 }
 
 .indent-5 {
-  font-style: normal;
   padding-left: 5rem;
 }
 
 .indent-6 {
-  font-style: normal;
   padding-left: 6rem;
 }
 
 .indent-7 {
-  font-style: normal;
   padding-left: 7rem;
 }
 
 .indent-8 {
-  font-style: normal;
   padding-left: 8rem;
 }
 
 .indent-9 {
-  font-style: normal;
   padding-left: 9rem;
 }
 
 .indent-10 {
-  font-style: normal;
   padding-left: 10rem;
 }