Refactor for-loop to map

Author: aciidgh

Sources/Xcodeproj/Module+PBXProj.swift

@@ -156,12 +156,8 @@ extension SwiftModule {
             return (headerPathKey, first)
         }
 
-        var headerPathValue = "(\n"
-        for header in headerPaths {
-            headerPathValue += "\"\(header)\","
-        }
-        headerPathValue += ")"
-
+        let headerPathValue = "( " + headerPaths.map({ "\"\($0)\"" }).joined(separator: ", ") + " )"
+        
         return (headerPathKey, headerPathValue)
     }