Fix #4269 - Removes empty/special characters (#4270)

* Remove ufeff

* Remove u2064

* Remove u2062

* Replace u202f followed by : with  :

* Replace u202f next to « or » with   and « or »

* Replace u202f followed by ; with  ;

* Replace u202f followed by ! with  

* Replace u202f followed by ? with  ?

* Replace remaining u202f with classical space

* Replace u200b surrounded by space  with classical space

* Replace u200b surrounded by space  with classical space - again (repeated)

* Remove remaining u200b

* Remove u200a

* Replace u2009 with  

* Remove u00ad

* Replace u00a0 followed by : ! or ? with   and punctuation

* Replace u00a0 surrounded « or » with   and punctuation

* Replace u00a0 followed by whitespaces

* Replace u00a0 preceded by whitespaces

* Replace u00a0 followed by a newline with a newline

* Replace u00a0 followed by a newline with a newline - Take2

* Replace u00a0 followed by a ;   and punctuation

* Remove u00a0 followed by ,

* Remove u00a0 in indentation spaces with \n([ ]*)([\u00a0])([ ]*)

* Manual replacement of ([\u00a0])([ ]+)

* Replace remaining ([\u00a0]+) by a space

* cleaning empty elements

* remove ufe0f

* Remove u00a0 and u202f after merging against updated main

* remove double whitespace using (\w)(  )(\w)

1 files changed, 8 insertions, 9 deletions

diff --git a/files/fr/tools/performance/waterfall/index.html b/files/fr/tools/performance/waterfall/index.html
index caea98ceb1..3a349b3431 100644
--- a/files/fr/tools/performance/waterfall/index.html
+++ b/files/fr/tools/performance/waterfall/index.html
@@ -131,7 +131,7 @@ original_slug: Outils/Performance/Waterfall
     <p>Le calcul des positions et de la taille des éléments de la page. Cette opération est parfois appelée "reflow".</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/10707/purple.png" style="height: 21px; width: 60px;"></td>
-   <td> </td>
+   <td></td>
   </tr>
   <tr>
    <td>
@@ -140,7 +140,7 @@ original_slug: Outils/Performance/Waterfall
     <p>Affichage des pixels à l'écran</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/10705/green.png" style="height: 21px; width: 60px;"></td>
-   <td> </td>
+   <td></td>
   </tr>
   <tr>
    <td>
@@ -155,7 +155,6 @@ original_slug: Outils/Performance/Waterfall
      <dd>Une chaine de caractères indiquant la raison pour laquelle le ramasse-miettes a été effectué.</dd>
      <dt>Raison du cycle non incrémentiel</dt>
      <dd>Si l'évènement n'était pas incrémentiel, une chaine expliquant pourquoi la GC a été effectuée.</dd>
-     <dt> </dt>
      <dd>
      <div class="geckoVersionNote">
      <p>Nouveau dans Firefox 46: Si l’évènement GC a été causé par une d'allocation, un nouveau lien "Show Allocation Triggers". Cliquer dessus affiche le profil d'allocation menant à cet évènement.</p>
@@ -189,9 +188,9 @@ original_slug: Outils/Performance/Waterfall
     <p>Préparation/préoptimisation pour le Cycle Collection.</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/10709/red.png" style="height: 21px; width: 60px;"></td>
-   <td><span class="hidden"> </span>
-    <p><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><strong>Type</strong></p>
-    <span class="hidden"> </span>
+   <td><span class="hidden"> </span>
+    <p><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><span class="hidden"> </span><strong>Type</strong></p>
+    <span class="hidden"> </span>
 
     <dl>
      <dd>Toujours "ForgetSkippable".</dd>
@@ -237,7 +236,7 @@ original_slug: Outils/Performance/Waterfall
     <p>L'évènement <code><a href="/en-US/docs/Web/Events/DOMContentLoaded">DOMContentLoaded</a></code> du document</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/12191/red.png" style="height: 21px; width: 60px;"></td>
-   <td> </td>
+   <td></td>
   </tr>
   <tr>
    <td>
@@ -246,7 +245,7 @@ original_slug: Outils/Performance/Waterfall
     <p>L'évènement <code><a href="/en-US/docs/Web/Events/load">load</a></code> du document.</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/12193/blue.png" style="height: 21px; width: 60px;"></td>
-   <td> </td>
+   <td></td>
   </tr>
   <tr>
    <td>
@@ -270,7 +269,7 @@ original_slug: Outils/Performance/Waterfall
    <td>
     <p><strong>Worker event in worker thread</strong></p>
 
-    <p>Affiché lorsque le worker  envoie un message à un worker, ou reçoit un message du thread principal.</p>
+    <p>Affiché lorsque le worker envoie un message à un worker, ou reçoit un message du thread principal.</p>
    </td>
    <td><img alt="" src="https://mdn.mozillademos.org/files/12197/orange2-hollow.png" style="height: 21px; width: 60px;"></td>
    <td>