Comment fix.

modules/juce_core/files/juce_File.h

@@ -205,8 +205,7 @@ public:
 
         @param extensionToTest  the extension to look for - it doesn't matter whether or
                                 not this string has a dot at the start, so ".wav" and "wav"
-                                will have the same effect. The comparison used is
-                                case-insensitve. To compare with multiple extensions, this
+                                will have the same effect. To compare with multiple extensions, this
                                 parameter can contain multiple strings, separated by semi-colons -
                                 so, for example: hasFileExtension (".jpeg;png;gif") would return
                                 true if the file has any of those three extensions.