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, 1 insertions, 1 deletions

diff --git a/files/fr/learn/css/building_blocks/debugging_css/index.md b/files/fr/learn/css/building_blocks/debugging_css/index.md
index 0ce7d1dc55..33d31ff5dc 100644
--- a/files/fr/learn/css/building_blocks/debugging_css/index.md
+++ b/files/fr/learn/css/building_blocks/debugging_css/index.md
@@ -128,7 +128,7 @@ Above that in the stylesheet however is a rule with a `.special` selector:
 }
 ```
 
-As you will recall from the lesson on [cascade and inheritance](/fr/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance) where we discussed specificity, class selectors are more specific than element selectors, and so this is the value that applies. DevTools can help you find such issues, especially if the information is buried somewhere in a huge stylesheet.
+As you will recall from the lesson on [cascade and inheritance](/fr/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance) where we discussed specificity, class selectors are more specific than element selectors, and so this is the value that applies. DevTools can help you find such issues, especially if the information is buried somewhere in a huge stylesheet.
 
 **Inspect the `<em>` with the class of `.special` and DevTools will show you that orange is the color that applies, and also shows you the `color` property applied to the em crossed out. You can now see that the class is overriding the element selector.**