Fixed: Replace duplicate slashes from file names when importing

Fixes #3470

src/NzbDrone.Common.Test/OsPathFixture.cs

@@ -185,6 +185,15 @@ namespace NzbDrone.Common.Test
             osPath.FullPath.Should().Be(@"/just/a/test/to/verify the/slashes/");
         }
 
+        [Test]
+        public void should_fix_double_slashes_unix()
+        {
+            var osPath = new OsPath(@"/just/a//test////to/verify the/slashes/");
+
+            osPath.Kind.Should().Be(OsPathKind.Unix);
+            osPath.FullPath.Should().Be(@"/just/a/test/to/verify the/slashes/");
+        }
+
         [Test]
         public void should_combine_mixed_slashes()
         {

src/NzbDrone.Common/Disk/OsPath.cs

@@ -85,7 +85,13 @@ namespace NzbDrone.Common.Disk
                 case OsPathKind.Windows:
                     return path.Replace('/', '\\');
                 case OsPathKind.Unix:
-                    return path.Replace('\\', '/');
+                    path = path.Replace('\\', '/');
+                    while (path.Contains("//"))
+                    {
+                        path = path.Replace("//", "/");
+                    }
+
+                    return path;
             }
 
             return path;