Indentation in preformatted text

[rhartmann]

There's a minor issue with the indentation being stripped off the first line of preformatted text and code blocks.

Example page:

# Preformatted

     Hello :) This is at 5 spaces.
     5 spaces here as well.

Rendered by GitHub:

Preformatted

 Hello :) This is at 5 spaces.
 5 spaces here as well.

Rendered by An Otter Wiki:

Mistune preserves the leading space both in preformatted and code blocks:

>>> import mistune
>>> text = """# Preformatted
...
...      Hello :)
...      5 spaces
... """
>>> mistune.html(text)
'<p>&quot;# Preformatted</p>\n<pre><code> Hello :)\n 5 spaces\n</code></pre>\n'
                                         ^
>>> text = """# Code block
...
... ```
...  One leading space here
...  and here.
... ```
... """
>>> mistune.html(text)
'<h1>Code block</h1>\n<pre><code> One leading space here\n and here.\n</code></pre>\n'
                                 ^

An Otter Wiki should, too. Removing leading spaces hurts Otters like this one:

                                                                                      _____         
                                                                                   _----:_:::+*+:   
                                                                               _:-=-_ _:_    =*++:  
                                                                            _-=-_     _:_       =-_ 
                                                                          _-+#*=_             _-#-  
                                                                         _::_=+=_           :+#*-_  
                                                                         ==               :**#*-    
                                                                         ==              :==_::_    
                                                                        :-:               -+___     
                                                                        +:                _=:_      
                                                                       _+:                 _*:      
                                                                      _:-_                 _+-      
                                                                      :+_                   =-_     
                                                        _::--==+++****#*_                   --_     
                                                __:-=+++=--::_____   :+*_                   --_     
                                             :=+=:___                :+#_                   =-_     
                                         _:=+-_                      _=P-_                 _*=_     
                                       _==-_                          -#+_                 :#=_     
                                     _-+:                             _=#-                :*P-      
                                    ==:                                _+=:              _=P#:      
                                  :+=_                                   -=_             =#P+_      
                                 -+:                                       _            =#P#_       
                                ==:                                                   _=PP*-        
                              _:+:                                                   :+PPP+         
                              :+:                                                   -#PPP#=         
                              :+_                                                  _#PPPP*-         
                              :=                                                   :#PPPP*:         
                              :=                            _:-=====-:__          _-+#PPPP+:        
                              :+                        _-*PPPPP#+-__:-++=:_      _--=*PPPPPP*=:    
  _:=+****+=-:_               :*_                    _=#PPPPP#+:_        __-+=:   _==__+PPPPPPP#=_  
       _-+*#PPPP##*+======++*#PP:_                 _=#PPPPP#=_               :+#**#PP#=:-+#PPPPP=_  
            __:-=*#PPPPPPPPPPPPP*:                :*PPPPP+:                    :*PPPPPPP#-_:****-_  
                     _:=+*###PPPP+:              :*PPPPP#-                       _=#PPPPP*:         
                           ___:-+*#+:           -#PPPPPPP#*-                        :*PPPP#=        
                                  _+##*=:_____-+PPPPPP#****=                         _=*+##*_       
                                    _:-=+#PPPPPPPP#+:_                                   ___        
                                         _=PPPPPPP=                                                 
                                          _-=+++=:_                                                 

[redimp]

An Otter Wiki should, too. Removing leading spaces hurts Otters like this one:

😂 A well-presented case.

[redimp]

Fix released in v2.9.4.