Experimenting with wiki linking via a math symbol

• Displaying only the symbol itself
  • ${\displaystyle \subseteq }$ Just a symbol
  • ${\displaystyle \subseteq }$ The name within a wiki link
• Displaying the symbol within a larger math expression
  • ${\displaystyle E\subseteq \{\{x,y\}\mid x,y\in V\;{\textrm {and}}\;x\neq y\}}$ Just a symbol (but why is it padded with an initial space?)
  • ${\displaystyle E}$ ${\displaystyle \subseteq }$${\displaystyle \{\{x,y\}\mid x,y\in V\;{\textrm {and}}\;x\neq y\}}$ The name within a wiki link
• Original text from the live page (also padded with an initial space - why?)
  • ${\displaystyle E\subseteq \{\{x,y\}\mid x,y\in V\;{\textrm {and}}\;x\neq y\}}$, a set of edges (also called links or lines), which are unordered pairs of vertices (that is, an edge is associated with two distinct vertices).