Cleanup

[VincentTam]

Clean up text files (selected by grep -I, excluding images (SVG) and minified scripts *.min.*)

1. Replaced tabs \t with two white spaces ␣␣.

2. Remove trailing spaces.

3. Added back missing newline \n to EOF.

4. Unified indentation (two white spaces ␣␣.)

5. Removed invisible zero-width space (U+200B) in

   beautifulhugo/exampleSite/content/post/2017-03-05-math-sample.md

   Lines 35 to 39 in 04617dd

   	```
   	​​$$
   	\frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } }
   	$$
   	​​

   You may verify this by running curl ... | od -c on your remotely hosted files.

   $ curl -L \
   https://github.com/halogenica/beautifulhugo/raw/master/exampleSite/content/post/2017-03-05-math-sample.md \
   | od -c
     % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                    Dload  Upload   Total   Spent    Left  Speed
   100   182  100   182    0     0    274      0 --:--:-- --:--:-- --:--:--   274
   100  1328  100  1328    0     0   1370      0 --:--:-- --:--:-- --:--:--  1370
   0000000   -   -   -  \n   t   i   t   l   e   :       M   a   t   h····
   0000020   S   a   m   p   l   e  \n   s   u   b   t   i   t   l   e   :
   ...
   0001420   \   c   d   o   t   s   }       }       }       }  \n   $   $
   0001440  \n   `   `   `  \n 342 200 213 342 200 213   $   $  \n   \   f
   0001460   r   a   c   {   1   }   {   \   B   i   g   l   (   \   s   q
   0001500   r   t   {   \   p   h   i       \   s   q   r   t   {   5   }
   0001520   }   -   \   p   h   i   \   B   i   g   r   )       e   ^   {
   0001540   \   f   r   a   c   2   5       \   p   i   }   }       =····
   0001560   1   +   \   f   r   a   c   {   e   ^   {   -   2   \   p   i
   0001600   }   }       {   1   +   \   f   r   a   c   {   e   ^   {   -
   0001620   4   \   p   i   }   }       {   1   +   \   f   r   a   c   {
   0001640   e   ^   {   -   6   \   p   i   }   }       {   1   +   \   f
   0001660   r   a   c   {   e   ^   {   -   8   \   p   i   }   }       {
   0001700   1   +   \   c   d   o   t   s   }       }       }       }  \n
   0001720   $   $  \n 342 200 213 342 200 213      \n  \n   #   #   #····
   0001740   E   x   a   m   p   l   e       3  \n   `   `   `  \n   $   $
   0001760  \n   1       +           \   f   r   a   c   {   q   ^   2   }
   ...