tweak S199 S200 definitions

spaces/S000199/README.md

@@ -3,6 +3,5 @@ uid: S000199
 name: Left ray topology on $\omega$
 ---
 
-$\omega$ with the topology given by basic open sets of the form
-$(\leftarrow,n)$ for each $n<\omega$. (Equivalently, $\omega$ with
-the topology $\omega+1$.)
+$\omega$ with the topology of left rays
+$$\{\omega\}\cup\{(\leftarrow,n):n<\omega\}.$$

spaces/S000200/README.md

@@ -3,5 +3,5 @@ uid: S000200
 name: Right ray topology on $\omega$
 ---
 
-$\omega$ with the topology given by basic open sets of the form
-$[n,\rightarrow)$ for each $n<\omega$.
+$\omega$ with the topology of right rays
+$$\{\emptyset\}\cup\{[n,\rightarrow):n<\omega\}.$$