Polish "Fix Homebrew formula to use libexec"

See gh-47696

Author: snicoll

spring-boot-project/spring-boot-tools/spring-boot-cli/src/main/homebrew/spring-boot.rb

@@ -17,13 +17,12 @@ def install
     end
 
     libexec.install Dir["#{root}/*"]
-    
-	(bin/"spring").write_env_script libexec/"bin/spring", {}
+    (bin/"spring").write_env_script libexec/"bin/spring", {}
 
-	bash_comp = libexec/"shell-completion/bash/spring"
-	zsh_comp  = libexec/"shell-completion/zsh/_spring"
+    bash_comp = libexec/"shell-completion/bash/spring"
+    zsh_comp  = libexec/"shell-completion/zsh/_spring"
 
-	bash_completion.install bash_comp if bash_comp.exist?
-	zsh_completion.install  zsh_comp  if zsh_comp.exist?
+    bash_completion.install bash_comp if bash_comp.exist?
+    zsh_completion.install  zsh_comp  if zsh_comp.exist?
   end
 end