remove blank lines plus some other small edits

[presnick]

Students haven’t seen any statements that require a colon yet, or at least haven’t been taught what they were. This was originally semi-colons that we amended to colons but I think it’s better to just go with parens at this point in the course.

On Sat, Mar 4, 2023 at 3:38 PM Bradley Miller @.***> wrote:

@.**** commented on this pull request.

In _sources/Debugging/SemanticErrors.rst https://github.com/RunestoneInteractive/fopp/pull/355#discussion_r1125546599 :

@@ -97,7 +97,7 @@ correctly.

.. mchoice:: question4_6_1 :answer_a: Attempting to divide by 0.

• :answer_b: Forgetting a semi-colon at the end of a statement where one is required.
• :answer_b: Forgetting a right-parenthesis ) when invoking a function.

Just curious about these changes.... Have colons fallen out of favor?

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