add fixed growth for bpis

cmd/clitest/index.html

@@ -68,6 +68,11 @@
           <input name="prediction" type="text" value="contributions=&prediction=interest=AssetAccount:Cash \$ 0.02"/>
         </span>
 
+        <span>
+          <label for="predictFixedGrowth">predictFixedGrowth</label>
+          <input name="predictFixedGrowth" type="text" value="VBTLX=0.02"/>
+        </span>
+
         <span>
           <input type="submit"/>
         </span>

cmd/clitest/main.go

@@ -134,7 +134,7 @@ func main() {
 				}
 			}
 
-			if r.URL.Query().Get("bpi") != "" {
+			if r.URL.Query().Get("bpi") == "true" {
 				register = register.WithBPIs(bpis)
 				predicted = predicted.WithBPIs(bpis)
 			}