Fix a couple of things in the how to use the book chapter

Author: Susan Vanderplas

index.qmd

@@ -71,8 +71,8 @@ Linux specific instructions. I will usually try to make this generic, but if it'
 
 
 
-::: callout-important
-#### Warnings {.unnumbered}
+::: callout-caution
+#### Warnings {-}
 
 These sections contain things you may want to look out for: common errors, mistakes, and unfortunate situations that may arise when programming.
 :::
@@ -90,15 +90,15 @@ Examples are intended to be interactive - you should attempt them before looking
 
 
 ::: panel-tabset
-##### Problem {.unnumbered}
+##### Problem {-}
 
 The problem will be in the first tab for you to start with
 
-##### R Solution {.unnumbered}
+##### R Solution {-}
 
 A solution will be provided in R, potentially with an explanation. 
 
-##### Python Solution {.unnumbered}
+##### Python Solution {-}
 
 A solution will be provided in Python as well, with an explanation of that code.
 
@@ -117,7 +117,7 @@ Passively reading code does not result in information retention.
 <!-- ::: -->
 
 ::: learnmore
-#### Learn More {.unnumbered}
+#### Learn More {-}
 These sections will direct you to additional resources that may be helpful to consult as you learn about a topic. 
 You do not have to use these sections unless you are 1) bored, or 2) hopelessly lost. 
 They're provided to help but are not expected reading (Unlike the essential reading sections in red).
@@ -129,14 +129,14 @@ They're provided to help but are not expected reading (Unlike the essential read
 <!-- These generic sections contain information I may want to call attention to, but that isn't necessarily urgent or a common error trap. -->
 <!-- ::: -->
 
-::: .advanced
-#### Advanced
+::: advanced
+#### Advanced {-}
 These sections are intended to apply to more advanced courses. 
 If you are taking an introductory course, feel free to skip that content for now.
 :::
 
 
-#### Expandable Sections {.unnumbered}
+#### Expandable Sections {-}
 
 <details>
 
@@ -151,7 +151,7 @@ This additional information may be information that is helpful but not essential
 </details>
 
 ::: {.callout-note collapse="true"}
-#### Another type of expandable note
+#### Another type of expandable note  {-}
 
 Answers or punchlines may be hidden in this type of expandable section as well.
 :::