Typos/whitespace

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: VSadov

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -2876,7 +2876,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\LowLevelLifoSemaphore.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\LowLevelThreadBlocker.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\LowLevelFutex.Windows.cs" Condition="'$(TargetsWindows)' == 'true'" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Threading\LowLevelFutex.Unix.cs" Condition="'$(TargetsUnix)' == 'true'" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Threading\LowLevelFutex.Unix.cs" Condition="'$(TargetsLinux)' == 'true'" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\PreAllocatedOverlapped.Windows.cs" Condition="'$(TargetsWindows)' == 'true'" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\PreAllocatedOverlapped.Unix.cs" Condition="'$(TargetsUnix)' == 'true' or ('$(TargetsBrowser)' == 'true' and '$(FeatureMultithreading)' == 'true')" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Threading\PreAllocatedOverlapped.Portable.cs" Condition="'$(FeatureMultithreading)' == 'true'" />

src/libraries/System.Private.CoreLib/src/System/Threading/LowLevelLifoSemaphore.cs

@@ -17,7 +17,7 @@ internal sealed partial class LowLevelLifoSemaphore
     {
         // Spinning in the threadpool semaphore is not always useful and benefits vary greatly by scenario.
         //
-        // Example1: An app periodically with rough time span T runs a task and waits for task`s completion.
+        // Example1: An app periodically with rough time span T runs a task and waits for task's completion.
         //           The app would benefit if a threadpool worker spins for longer than T as worker would not need to be woken up.
         //
         // Example2: The new workitems may be produced by non-pool threads and could only arrive if pool threads start blocking.