Improve Shared.xcconfig.

Xcode-config/Shared.xcconfig

@@ -1,16 +1,16 @@
-#include "DEVELOPMENT_TEAM.xcconfig"
+#include? "DEVELOPMENT_TEAM.xcconfig"
 
 // Create the file DEVELOPMENT_TEAM.xcconfig
 // in the "Xcode-config" directory within the project directory
 // with the following build setting:
 // DEVELOPMENT_TEAM = [Your TeamID]
 
-// Hint: recent Xcode versions appear to automatically create an empty file 
-// for you on the first build. This build will fail, or course, 
-// because code-signing can’t work without the DEVELOPMENT_TEAM set. 
-// Just fill it in and everything should work. 
+// One way to find your Team ID is to set the “Development Team”
+// build setting (Xcode key: "DEVELOPMENT_TEAM") and have a look
+// at the “Source Control” changes (menu item “Commit…”/⌥⌘C).
+// Just make sure that this change doesn’t actually get commited.
 
-// You can find your team ID by logging into your Apple Developer account
+// You can also find your Team ID by logging into your Apple Developer account
 // and going to
 // https://developer.apple.com/account/#/membership
 // It should be listed under “Team ID”.
@@ -27,12 +27,23 @@
 // and any other build configurations you might have.
 // There you can set the pull-down menus in the
 // “Based on Configuration File” column to “Shared”.
-// Done.
+// Your work in Xcode is done.
 
 // Don’t forget to add the DEVELOPMENT_TEAM.xcconfig file to your .gitignore:
 // # User-specific xcconfig files
 // Xcode-config/DEVELOPMENT_TEAM.xcconfig
+// The two lines above are an example.
+// Please don’t copy the comment slashes over though.
 
-// You can now remove the “DevelopmentTeam = AB1234C5DE;” entries from the
-// .xcodeproj/project.pbxproj if you want to.
+// You can and should now replace the “DevelopmentTeam = AB1234C5DE;” entries in
+// .xcodeproj/project.pbxproj
+// with “DevelopmentTeam = "";”
+// They would otherwise override the Team ID set via this config file and its include.
+// Please note that .pbxproj files use straight quotes.
 
+// When you commit changes to the Xcode project file
+// after changing settings in “Signing & Capabilities”
+// Entries like these may appear in your file changes/commit diff preview:
+// CODE_SIGN_IDENTITY = …;
+// CODE_SIGN_STYLE = Manual/Automatic;
+// Please make sure not to commit them to source control.