removed more invocation parens

Author: krawaller

chapters/strings/finding-substrings.md

@@ -10,18 +10,18 @@ You need to find the first or last occurrence of a search string within a messag
 ## Solution
 
 Use Javascript's indexOf() and lastIndexOf() to find the first and last occurrences of a string, respectively.
-Syntax: string.indexOf(searchstring, start)
+Syntax: string.indexOf searchstring, start
 
 {% highlight coffeescript %}
 message = "This is a test string. This has a repeat or two. This might even have a third."
-message.indexOf("This",0)
+message.indexOf "This", 0
 # => 0
 
 # Modifying the start parameter
-message.indexOf("This",5)
+message.indexOf "This", 5
 # => 23
 
-message.lastIndexOf("This")
+message.lastIndexOf "This"
 # => 49
 
 {% endhighlight %}

chapters/strings/repeating.md

@@ -13,7 +13,7 @@ Create an array of n+1 nulls, and then join it with the repetition string as the
 
 {% highlight coffeescript %}
 # create a string of 10 foos
-Array(11).join('foo')
+Array(11).join 'foo'
 
 # => "foofoofoofoofoofoofoofoofoofoo"
 {% endhighlight %}