fix: add missing whitespace in FIXME comment

Author: honghoker

stdlib/public/core/Span/RawSpan.swift

@@ -426,7 +426,7 @@ extension RawSpan {
 @available(SwiftStdlib 6.1, *)
 extension RawSpan {
 
-  //FIXME: mark closure parameter as non-escaping
+  // FIXME: mark closure parameter as non-escaping
   /// Calls the given closure with a pointer to the underlying bytes of
   /// the viewed contiguous storage.
   ///

stdlib/public/core/Span/Span.swift

@@ -95,7 +95,7 @@ extension Span where Element: ~Copyable {
   public init(
     _unsafeElements buffer: borrowing UnsafeBufferPointer<Element>
   ) {
-    let baseAddress = buffer.baseAddress //FIXME: rdar://138665760
+    let baseAddress = buffer.baseAddress // FIXME: rdar://138665760
     _precondition(
       ((Int(bitPattern: baseAddress) &
         (MemoryLayout<Element>.alignment &- 1)) == 0),
@@ -204,7 +204,7 @@ extension Span where Element: BitwiseCopyable {
   public init(
     _unsafeBytes buffer: borrowing UnsafeRawBufferPointer
   ) {
-    let baseAddress = buffer.baseAddress //FIXME: rdar://138665760
+    let baseAddress = buffer.baseAddress // FIXME: rdar://138665760
     _precondition(
       ((Int(bitPattern: baseAddress) &
         (MemoryLayout<Element>.alignment &- 1)) == 0),
@@ -448,7 +448,7 @@ extension Span where Element: ~Copyable {
   @_disallowFeatureSuppression(NonescapableTypes)
   @_alwaysEmitIntoClient
   public subscript(_ position: Index) -> Element {
-    //FIXME: change to unsafeRawAddress when ready
+    // FIXME: change to unsafeRawAddress when ready
     unsafeAddress {
       _precondition(indices.contains(position), "Index out of bounds")
       return _unsafeAddressOfElement(unchecked: position)
@@ -468,7 +468,7 @@ extension Span where Element: ~Copyable {
   @unsafe
   @_alwaysEmitIntoClient
   public subscript(unchecked position: Index) -> Element {
-    //FIXME: change to unsafeRawAddress when ready
+    // FIXME: change to unsafeRawAddress when ready
     unsafeAddress {
       _unsafeAddressOfElement(unchecked: position)
     }