This is the PageSequence template it allows for prev/next style page sequences to displayed with icons. See Template:Icon
{{PageSequence
|prev=
|next=
|category=
|categoryIcon=
}}
example
{{PageSequence|prev=|next=bash|category=tools|categoryIcon=linux}}
{{PageSequence
|prev=Template:Icon
|next=Template:Link
|category=Template
|categoryIcon=file-text-o
}}