Fix exception message

Author: dsplaisted

src/Cli/dotnet/CliStrings.resx

@@ -441,7 +441,10 @@ setx PATH "%PATH%;{0}"
     <value>More than one packaged shim is available: {0}.</value>
   </data>
   <data name="FailedToReadNuGetLockFile" xml:space="preserve">
-    <value>Failed to read NuGet LockFile for tool package '{0}': {1}</value>
+    <value>Failed to read NuGet assets file for tool package '{0}': {1}</value>
+  </data>
+  <data name="FailedToFindLibraryInAssetsFile" xml:space="preserve">
+    <value>Failed to find library in NuGet assets file for tool package '{0}': {1}</value>
   </data>
   <data name="LevelArgumentName" xml:space="preserve">
     <value>LEVEL</value>

src/Cli/dotnet/ToolPackage/ToolPackageInstance.cs

@@ -75,23 +75,14 @@ public ToolPackageInstance(PackageId id,
         }
         catch (Exception ex) when (ex is UnauthorizedAccessException || ex is IOException)
         {
-            throw new ToolPackageException(
-                string.Format(
-                    CliStrings.FailedToReadNuGetLockFile,
-                    Id,
-                    ex.Message),
-                ex);
+            throw new ToolPackageException(string.Format(CliStrings.FailedToReadNuGetLockFile, Id, ex.Message), ex);
         }
 
         var library = FindLibraryInLockFile(lockFile);
         if (library == null)
         {
             throw new ToolPackageException(
-                string.Format(
-                    //  TODO: Change exception message
-                    CliStrings.FailedToReadNuGetLockFile,
-                    Id,
-                    resolvedAssetsFileNameFullPath));
+                string.Format(CliStrings.FailedToFindLibraryInAssetsFile, Id, resolvedAssetsFileNameFullPath));
         }