fix: remove spaces before command output

[eine]

The first line of output of the execution of a command is shown with additional margin:

        -rwxrwxr-x. 1 user user 14 Aug 20 18:41 ./atest.md
-rwxrwxr-x. 1 user user 21 Aug 20 18:41 ./anothertest.txt

This PR fixes it by removing spaces in the HTML source.

[hacdias]

It solves the issue, but there must be another way though.

[eine]

At first I tried:

        <pre v-else-if="commands.length > 0"><!---
          --><template v-for="c in commands">{{ c }}</template><!--
        --></pre>

which works too. But I find it ugly.

[hacdias]

Yes, it's ugly eheh

[eine]

It seems to be tricky to change:

• Extra Blank Spaces Between Elements In Rendered Template vuejs/vue#7701
• https://www.w3schools.com/cssref/pr_text_white-space.asp

So I am going to merge this, and we will update it if we find a better alternative.