remove trailing whitespace

Author: coke

doc/Language/grammar_tutorial.pod6

@@ -87,7 +87,7 @@ So if we got a URI on the server of "/product/update/7/notify" we would want our
 
 The first thing we do is define the grammar class. We're going to need to define our subject, command and data as well. I think we'll use token for them, since we don't care about whitespace in the regex.
 
-    =begin code 
+    =begin code
     grammar REST {
         token subject { \w+ }
         token command { \w+ }
@@ -174,7 +174,7 @@ There are several ways to accomplish this. For example, you could change the com
 
     =begin code :skip-test
     token command { \w+ }
-    
+
     # …becomes…
 
     token command { 'create'|'retrieve'|'update'|'delete' }
@@ -204,13 +204,13 @@ This is what we've come up for processing our RESTful URIs so far:
     grammar REST
     {
         token TOP { <slash><subject><slash><command><slash>?<data>? }
-    
+
         proto token command {*}
         token command:sym<create>   { <sym> }
         token command:sym<retrieve> { <sym> }
         token command:sym<update>   { <sym> }
         token command:sym<delete>   { <sym> }
-    
+
         token subject { \w+ }
         token data    { .* }
         token slash   { \s* '/' \s* }
@@ -230,7 +230,7 @@ Let's look at various URI's and how they behave being passed through our grammar
     }
 
     # Sub: product Cmd: update Dat: 7/notify
-    # Sub: product Cmd: create Dat: 
+    # Sub: product Cmd: create Dat:
     # Sub: item Cmd: delete Dat: 4
     =end code
 
@@ -272,13 +272,13 @@ Here we are back to our grammar, as we left it.
     grammar REST
     {
         token TOP { <slash><subject><slash><command><slash>?<data>? }
-    
+
         proto token command {*}
         token command:sym<create>   { <sym> }
         token command:sym<retrieve> { <sym> }
         token command:sym<update>   { <sym> }
         token command:sym<delete>   { <sym> }
-    
+
         token subject { \w+ }
         token data    { .* }
         token slash   { \s* '/' \s* }
@@ -410,13 +410,13 @@ And this is the grammar and grammar actions that got us there, to recap:
     grammar REST
     {
         token TOP { <slash><subject><slash><command><slash>?<data>? }
-    
+
         proto token command {*}
         token command:sym<create>   { <sym> }
         token command:sym<retrieve> { <sym> }
         token command:sym<update>   { <sym> }
         token command:sym<delete>   { <sym> }
-    
+
         token subject { \w+ }
         token data    { .* }
         token slash   { \s* '/' \s* }