Generated sections don't always end with newline

[chronodm]

Steps to reproduce:

1. joe g emacs,java

Expected:

• Cleanly generated .gitignore for Emacs and Java, e.g.

#### joe made this: http://goel.io/joe
#### emacs ####
(...)
# projectiles files
.projectile

#### java ####
*.class
(...)

Actual:

• Generated emacs .gitignore doesn't end with newline, producing:

#### joe made this: http://goel.io/joe
#### emacs ####
(...)
# projectiles files
.projectile#### java ####
*.class
(...)

[Karan Goel]

Will fix in next release.