diff --git a/index.html b/index.html
index a2bcd36..7216cd7 100644
--- a/index.html
+++ b/index.html
@@ -820,7 +820,7 @@ <h2>traceback vs rlang functions</h2>
 <h2>browser()</h2>
 <div class="cell">
 <div class="sourceCode cell-code" id="cb13" data-code-line-numbers="2"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb13-1"><a href="#cb13-1"></a>f <span class="ot">&lt;-</span> <span class="cf">function</span>(x) {</span>
-<span id="cb13-2"><a href="#cb13-2"></a>  <span class="fu">browser</span>(x)</span>
+<span id="cb13-2"><a href="#cb13-2"></a>  <span class="fu">browser</span>()</span>
 <span id="cb13-3"><a href="#cb13-3"></a>  x <span class="sc">+</span> <span class="dv">1</span></span>
 <span id="cb13-4"><a href="#cb13-4"></a>}</span>
 <span id="cb13-5"><a href="#cb13-5"></a></span>
@@ -914,7 +914,7 @@ <h2>Your turn, exercise 01</h2>
 </div>
 <div class="cell">
 <div class="cell-output-display">
-<div class="countdown" id="timer_62da051a" style="right:0;bottom:0;font-size:2em;" data-audio="true" data-warnwhen="0">
+<div class="countdown" id="timer_62df014c" style="right:0;bottom:0;font-size:2em;" data-audio="true" data-warnwhen="0">
 <code class="countdown-time"><span class="countdown-digits minutes">15</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
 </div>
 </div>
@@ -1049,7 +1049,7 @@ <h2>Your turn, exercise 02</h2>
 </div>
 <div class="cell">
 <div class="cell-output-display">
-<div class="countdown" id="timer_62da0273" style="right:0;bottom:0;" data-warnwhen="0">
+<div class="countdown" id="timer_62df00f1" style="right:0;bottom:0;" data-warnwhen="0">
 <code class="countdown-time"><span class="countdown-digits minutes">07</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
 </div>
 </div>
@@ -1226,7 +1226,7 @@ <h2>Your turn, exercise 03</h2>
 </div>
 <div class="cell">
 <div class="cell-output-display">
-<div class="countdown" id="timer_62da054c" style="right:0;bottom:0;" data-warnwhen="0">
+<div class="countdown" id="timer_62df0233" style="right:0;bottom:0;" data-warnwhen="0">
 <code class="countdown-time"><span class="countdown-digits minutes">10</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
 </div>
 </div>
@@ -1373,7 +1373,7 @@ <h2>Your turn, investigating a CRAN package</h2>
 </div>
 <div class="cell">
 <div class="cell-output-display">
-<div class="countdown" id="timer_62da0289" style="right:0;bottom:0;" data-warnwhen="0">
+<div class="countdown" id="timer_62deffa0" style="right:0;bottom:0;" data-warnwhen="0">
 <code class="countdown-time"><span class="countdown-digits minutes">03</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
 </div>
 </div>
@@ -1417,7 +1417,7 @@ <h2>Your turn, investigating source code</h2>
 <p><em>Hints on next slides.</em></p>
 <div class="cell">
 <div class="cell-output-display">
-<div class="countdown" id="timer_62da0291" style="right:0;bottom:0;" data-warnwhen="0">
+<div class="countdown" id="timer_62df0057" style="right:0;bottom:0;" data-warnwhen="0">
 <code class="countdown-time"><span class="countdown-digits minutes">05</span><span class="countdown-digits colon">:</span><span class="countdown-digits seconds">00</span></code>
 </div>
 </div>
diff --git a/index.qmd b/index.qmd
index 6ec84e5..1aea1b0 100644
--- a/index.qmd
+++ b/index.qmd
@@ -17,7 +17,6 @@ execute:
 
 # Agenda
 
-
 Getting started
 
 Troubleshooting
@@ -34,8 +33,6 @@ Special cases
 
 Read the source
 
-
-
 # Getting started
 
 ```{r}
@@ -106,8 +103,6 @@ Artwork by [\@allison_horst](https://twitter.com/allison_horst).
 <https://github.com/allisonhorst/stats-illustrations>
 :::
 
-
-
 # Troubleshooting
 
 ## 1. Search
@@ -242,7 +237,6 @@ Troubleshooting strategies:
 <https://giphy.com/gifs/TreehouseDirect-agent-binky-8UabbehIqkR0akDt1y>
 :::
 
-
 # Moving on
 
 <br>
@@ -471,7 +465,7 @@ Numbering and ordering differs between `traceback()` and rlang functions.
 
 ```{r, eval=FALSE, echo=TRUE, `code-line-numbers`="2"}
 f <- function(x) {
-  browser(x)
+  browser()
   x + 1
 }
 
@@ -498,8 +492,7 @@ g <- function(x) f(x)
 
 ::: columns
 ::: {.column width="35%"}
-
-Investigate objects 
+Investigate objects
 
 <br>
 
@@ -516,28 +509,19 @@ Control execution
 
 <br>
 
-::: {.small}
-
-| command | operation               |
-|---------|-------------------------|
-| `n`     | next statement          |
+::: small
+| command | operation                              |
+|---------|----------------------------------------|
+| `n`     | next statement                         |
 | `c`     | continue (leave interactive debugging) |
-| `s`     | step into function call |
-| `f`     | finish loop / function  |
-| `where` | show previous calls     |
-| `Q`     | quit debugger           |
+| `s`     | step into function call                |
+| `f`     | finish loop / function                 |
+| `where` | show previous calls                    |
+| `Q`     | quit debugger                          |
 :::
-
 :::
-
 :::
 
-
-
-
-
-
-
 ## Debugging your code
 
 ![](img/debugging_yours.svg)
@@ -948,8 +932,6 @@ countdown(
 
 2.  WTF Ch 11.4 Debugging in Rmarkdown documents <https://rstats.wtf/debugging-r-code.html#debugging-in-r-markdown-documents>
 
-
-
 ## Piped expressions
 
 <br>
@@ -974,8 +956,6 @@ gives trimmed tracebacks when using pipes
 
 -   Matt Dray 2019 blog post [Fix leaky pipes in R](https://www.rostrum.blog/2019/04/07/fix-leaky-pipes/)
 
-
-
 ## Warnings
 
 <br>