web browser – Simple way to safely paste text from website into terminal

It’s fairly well known that it’s very dangerous to copy-paste text from a website into a terminal, as it can include extra text, control codes, and newlines that aren’t visible when you’re copying it, but which are saved into the paste buffer, causing malicious code to execute if pasted into a terminal.

The above-linked website contains the following HTML and CSS:

<p class="codeblock">
  <!-- Oh noes, you found it! -->
  git clone
  <span style="position: absolute; left: -100px; top: -100px">/dev/null; clear; echo -n "Hello ";whoami|tr -d 'n';echo -e '!nThat was a bad idea. Don'"'"'t copy code from websites you don'"'"'t trust!<br>Here'"'"'s the first line of your /etc/passwd: ';head -n1 /etc/passwd<br>git clone </span>
  git://git.kernel.org/pub/scm/utils/kup/kup.git
</p>

This renders as git clone git://git.kernel.org/pub/scm/utils/kup/kup.git, but when you highlight and copy it, it pastes multiple lines into a terminal, causing them to be executed:

git clone /dev/null; clear; echo -n "Hello ";whoami|tr -d 'n';echo -e '!nThat was a bad idea. Don'"'"'t copy code from websites you don'"'"'t trust!
Here'"'"'s the first line of your /etc/passwd: ';head -n1 /etc/passwd
git clone git://git.kernel.org/pub/scm/utils/kup/kup.git

Is there any simple, fast way to get around this for single-line strings? For example, copying the text, pasting it into the browser’s search bar, and copying it from there seems to remove all newlines:

git clone /dev/null; clear; echo -n "Hello ";whoami|tr -d 'n';echo -e '!nThat was a bad idea. Don'"'"'t copy code from websites you don'"'"'t trust!Here'"'"'s the first line of your /etc/passwd: ';head -n1 /etc/passwdgit clone git://git.kernel.org/pub/scm/utils/kup/kup.git

Now you would have to explicitly press enter in order to cause the code to execute, and the act of pasting it into the terminal is not enough. Is this a safe way to protect from all variants of this attack?