Fix spacing mistakes in the 2023-07 draft

spec/2023-07-draft.md

@@ -482,6 +482,7 @@ illustration | image     | `.png`, `.jpg`, `.jpeg`, or `.svg` | privileged infor
 
 - An *illustration* provides a visualization of the associated test case.
   Note that at most one image file may exist for each test case.
+
 ### Interactive Problems
 
 For interactive problems, any sample test cases must provide an interaction protocol as a text file with the extension `.interaction` for each sample demonstrating the communication between the submission and the output validator,
@@ -496,7 +497,6 @@ Unlike `.in` and `.ans` files for non-interactive problem, interactive `.in` and
 not in the problem statement, nor as part of sample input download.
 If you want to provide files related to interactive problems (such as testing tools or input files) you can use [attachments](#attachments).
 
-
 ### Test Data Groups
 
 The test data for the problem can be organized into a tree-like structure.
@@ -737,7 +737,7 @@ The meaning of the parameters listed above are:
   The answer file may, but is not necessarily required to, contain the "correct answer" for the problem.
   For example, it might contain the output that was produced by a judge's solution for the problem when run with input file as input.
   Alternatively, the "answer file" might contain information, in arbitrary format, which instructs the validator in some way about how to accomplish its task.
-  
+
 - feedback_dir:
   a string which specifies the name of a "feedback directory" in which the validator can produce "feedback files" in order to report additional information on the validation of the output file.
   The feedbackdir must end with a path separator (typically '/' or '\\' depending on operating system),