nits: strip flags

Author: sue445

_gem/lib/go_gem/rake_task.rb

@@ -140,7 +140,7 @@ def self.generate_cflags
       # FIXME: Workaround for Alpine
       cflags.gsub!("-Wpointer-arith", "") if RUBY_PLATFORM =~ /linux-musl/i
 
-      cflags
+      cflags.strip
     end
     private_class_method :generate_cflags
 

_gem/lib/go_gem/util.rb

@@ -29,7 +29,7 @@ def self.generate_ldflags
       # FIXME: Workaround for Ubuntu (GitHub Actions)
       ldflags.gsub!("-Wl,--unresolved-symbols=ignore-all", "") if RUBY_PLATFORM =~ /linux/i
 
-      ldflags
+      ldflags.strip
     end
   end
 end