exceptions.rb: remove unnecessary chomps

remove `chomp!` from method 'initialize' in class 'BuildFlagsError'

Library/Homebrew/exceptions.rb

@@ -463,15 +463,15 @@ class BuildFlagsError < RuntimeError
       require_text = "requires"
     end
 
-    message = <<~EOS.chomp!
+    message = <<~EOS
       The following #{flag_text}:
         #{flags.join(", ")}
       #{require_text} building tools, but none are installed.
       #{DevelopmentTools.installation_instructions}
     EOS
 
-    message << <<~EOS.chomp! if bottled
-      \nAlternatively, remove the #{flag_text} to attempt bottle installation.
+    message << <<~EOS if bottled
+      Alternatively, remove the #{flag_text} to attempt bottle installation.
     EOS
 
     super message