Bugfix: evaluate home dir character as a string

.bash/prompt

@@ -20,7 +20,7 @@ rewrite_pwd()
 
 	pwdmaxlen=$(( ( pwdmaxlen < ${#dir} ) ? ${#dir} : pwdmaxlen ))
 
-	NEW_PWD=${PWD/$HOME/~}
+	NEW_PWD=${PWD/$HOME/"~"}
 
 	local pwdoffset=$(( ${#NEW_PWD} - pwdmaxlen ))