Fixes incorrectly named method and removes extraneous spaces

src/Umbraco.Core/StringExtensions.cs

@@ -1574,29 +1574,29 @@ namespace Umbraco.Core
             guid[left] = guid[right];
             guid[right] = temp;
         }
-
-
+        
         /// <summary>
         /// Converts a file name to a friendly name for a content item
         /// </summary>
         /// <param name="fileName"></param>
         /// <returns></returns>
-        public static string friendlyNameFromFilename(this string fileName)
+        public static string ToFriendlyName(this string fileName)
         {
             // strip the file extension
-            fileName = StripFileExtension(fileName);
+            fileName = fileName.StripFileExtension();
 
             // underscores and dashes to spaces
-            fileName = ReplaceMany(fileName, new char[] { '_', '-' }, ' ');
+            fileName = fileName.ReplaceMany(new[] { '_', '-' }, ' ');
 
             // any other conversions ?
 
             // Pascalcase (to be done last)
             fileName = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(fileName);
 
+            // Replace multiple consecutive spaces with a single space
+            fileName = string.Join(" ", fileName.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));
 
             return fileName;
         }
-
     }
 }

src/Umbraco.Web/Editors/MediaController.cs

@@ -717,7 +717,7 @@ namespace Umbraco.Web.Editors
                         mediaType = result.FormData["contentTypeAlias"];
                     }
 
-                    var mediaItemName = fileName.friendlyNameFromFilename();
+                    var mediaItemName = fileName.ToFriendlyName();
 
                     var f = mediaService.CreateMedia(mediaItemName, parentId, mediaType, Security.CurrentUser.Id);