Improve comments for PathBuilder functions

Sources/PathBuilder/PathBuilder.swift

@@ -21,27 +21,26 @@ public struct PathBuilder {
         component ?? EmptySubpath()
     }
 
-    /// With buildEither(second:), enables support for 'if-else' and 'switch'
+    /// With `buildEither(second:)`, enables support for 'if-else' and 'switch'
     /// statements by folding conditional results into a single result.
     public static func buildEither(first: PathComponent) -> PathComponent {
         first
     }
 
-    /// With buildEither(first:), enables support for 'if-else' and 'switch'
+    /// With `buildEither(first:)`, enables support for 'if-else' and 'switch'
     /// statements by folding conditional results into a single result.
     public static func buildEither(second: PathComponent) -> PathComponent {
         second
     }
 
-    /// This will be called on the partial result of an 'if
-    /// #available' block to allow the result builder to erase type
-    /// information.
+    /// This will be called on the partial result of an 'if #available'
+    /// block to allow the result builder to erase type information.
     public static func buildLimitedAvailability(_ component: PathComponent) -> PathComponent {
         component
     }
 
     /// This will be called on the partial result from the outermost
-    /// block statement to produce the final returned result Path.
+    /// block statement to produce the final returned result `Path`.
     public static func buildFinalResult(_ component: PathComponent) -> Path {
         Path { path in
             component.add(to: &path)