[ruby/en] remove trailing spaces

ruby.html.markdown

@@ -91,7 +91,7 @@ false.class #=> FalseClass
 2 <= 2 #=> true
 2 >= 2 #=> true
 
-# Combined comparison operator (returns `1` when the first argument is greater, 
+# Combined comparison operator (returns `1` when the first argument is greater,
 # `-1` when the second argument is greater, and `0` otherwise)
 1 <=> 10 #=> -1 (1 < 10)
 10 <=> 1 #=> 1 (10 > 1)
@@ -268,7 +268,7 @@ puts("Some warnings occurred:\n" + warnings.join("\n"))  if !warnings.empty?
 puts("Some warnings occurred:\n" + warnings.join("\n"))  unless warnings.empty?
 
 # Loops
-# In Ruby, traditional `for` loops aren't very common. Instead, these 
+# In Ruby, traditional `for` loops aren't very common. Instead, these
 # basic loops are implemented using enumerable, which hinges on `each`.
 (1..5).each do |counter|
   puts "iteration #{counter}"
@@ -415,10 +415,10 @@ surround { puts 'hello world' }
 #=> hello world
 #=> }
 
-# Blocks can be converted into a 'proc' object, which wraps the block 
+# Blocks can be converted into a 'proc' object, which wraps the block
 # and allows it to be passed to another method, bound to a different scope,
 # or manipulated otherwise. This is most common in method parameter lists,
-# where you frequently see a trailing '&block' parameter that will accept 
+# where you frequently see a trailing '&block' parameter that will accept
 # the block, if one is given, and convert it to a 'Proc'. The naming here is
 # convention; it would work just as well with '&pineapple'.
 def guests(&block)
@@ -426,7 +426,7 @@ def guests(&block)
   block.call(4)
 end
 
-# The 'call' method on the Proc is similar to calling 'yield' when a block is 
+# The 'call' method on the Proc is similar to calling 'yield' when a block is
 # present. The arguments passed to 'call' will be forwarded to the block as arguments.
 
 guests { |n| "You have #{n} guests." }
@@ -443,7 +443,7 @@ end
 upcased = ['Watch', 'these', 'words', 'get', 'upcased'].map(&:upcase)
 puts upcased
 #=> ["WATCH", "THESE", "WORDS", "GET", "UPCASED"]
- 
+
 sum = [1, 2, 3, 4, 5].reduce(&:+)
 puts sum
 #=> 15
@@ -472,7 +472,7 @@ def best(first, second, third, *others)
   puts "There were #{others.count} other participants."
 end
 
-best *ranked_competitors 
+best *ranked_competitors
 #=> Winners are John, Sally, and Dingus.
 #=> There were 2 other participants.