export: added new line to the end of the files

pages/linux/export.md

@@ -12,4 +12,4 @@
 
 - Append something to the PATH variable:
 
-`export PATH=$PATH:{{/path/to/append}}`
+`export PATH=$PATH:{{/path/to/append}}`

pages/osx/export.md

@@ -12,4 +12,4 @@
 
 - Append something to the PATH variable:
 
-`export PATH=$PATH:{{/path/to/append}}`
+`export PATH=$PATH:{{/path/to/append}}`