title: Insert line jump according to a condition, Bash Ubuntu
body: <p>I have the following text to edit in ubuntu's bash:</p>
  <pre><code>Fo, 68
  
  Fo, 55**Fm**,   328
  
  Fv, 273
  
  Fv/Fm,  0.832
  
  PAR,
      
  TEMP,
  
  Fs, 65
  
  Fm',    91
  
  èPS2,   0.286,
  </code></pre>
  <p>The text continues but the above is the fundamental unity.</p>
  <p>I want to insert a line jump before the first Fm (in the second line, not means that it is only in the second one), so I tried with:</p>
  <pre><code>sed -e 's/Fm/\nFm/g'
  </code></pre>
  <p>But this command insert a line jump after the bar / of Fv/Fm too. I want to avoid that because is my interest to conserve the Fv/Fm as it. In other words, I need to conserve Fv/Fm in that form.</p>
  <p>Thank you!</p>