Normalize the final new line

Fixes #310
Some files had no newlines, some had 1 newline and some more than 1 newline.
Normalize them all to have only 1 newline at the end of all files.

pages/common/gcc.md

@@ -13,5 +13,3 @@
 - Include libraries from a different path
 
 `gcc {{source.c}} -o {{executable}} -I{{header_path}} -L{{library_path}} -l{{library_name}}`
-
-