Format: fix #4620, to format /= after else in case (#4627)

`skip_space_or_newline` is not needed because it is called inside
`format_nested`.

Author: makenowjust

spec/compiler/formatter/formatter_spec.cr

@@ -460,6 +460,7 @@ describe Crystal::Formatter do
   assert_format "case  1 \n when  .foo? \n 3 \n end", "case 1\nwhen .foo?\n  3\nend"
   assert_format "case 1\nwhen 1 then\n2\nwhen 3\n4\nend", "case 1\nwhen 1\n  2\nwhen 3\n  4\nend"
   assert_format "case  1 \n when 2 \n 3 \n else 4 \n end", "case 1\nwhen 2\n  3\nelse 4\nend"
+  assert_format "a = 1\ncase\nwhen 2\nelse\n  a /= 3\nend"
 
   assert_format "select   \n when  foo \n 2 \n end", "select\nwhen foo\n  2\nend"
   assert_format "select   \n when  foo \n 2 \n when bar \n 3 \n end", "select\nwhen foo\n  2\nwhen bar\n  3\nend"

src/compiler/crystal/tools/formatter.cr

@@ -3277,12 +3277,8 @@ module Crystal
         write_keyword :else
         found_comment = skip_space
         if @token.type == :NEWLINE || found_comment
-          unless found_comment
-            write_line
-            next_token
-          end
-          skip_space_or_newline(@indent + 2)
-          format_nested(a_else, @indent)
+          write_line unless found_comment
+          format_nested(a_else)
           skip_space_or_newline(@indent + 2)
         else
           while @token.type == :";"