Bad Emacs defaults
&gt; Emacs famously has its idiosyncratic brace style and indentation style using a mix of tabs and spaces that no-one else uses.<p>Specifically, &#x27;one indent is four spaces, two indents is one tab, repeat&#x27;, which caused utter carnage for newbies editing YAML files since literal tabs aren&#x27;t valid YAML.<p>Back in the day, I built consensus to switch the perl <a href="https:&#x2F;&#x2F;p3rl.org&#x2F;Catalyst" rel="nofollow noreferrer">https:&#x2F;&#x2F;p3rl.org&#x2F;Catalyst</a> framework over to defaulting to an apache style config in the scaffold generator specifically because about 75% of our &quot;confused newbie&quot; questions on IRC at the time were people whose emacs config had broken their YAML config file.<p>Of course we&#x27;re -ahem- a few years on from that now, and people generally have already had at least one pitched battle with YAML before installing&#x2F;adopting another thing that uses it, but still, oh gods but that was frustrating for a while.