Increase precision of simulate sensor plot y-axis by 1 digit.

- Before this change, the y-axis scale had only one digit, leading to user confusion. Small changes in senor values could appear as if the values remained at the nearest integer value, while in fact the y-axis itself was changing, but this was not evident in the GUI due to the reduced precision.
- Fixes #719.

PiperOrigin-RevId: 506841881
Change-Id: I583036bba389cef8d9ecf1c1bbcfb573ef2285e6

simulate/simulate.cc

@@ -376,7 +376,7 @@ void sensorinit(mj::Simulate* sim) {
   mju::strcpy_arr(figsensor.title, "Sensor data");
 
   // y-tick nubmer format
-  mju::strcpy_arr(figsensor.yformat, "%.0f");
+  mju::strcpy_arr(figsensor.yformat, "%.1f");
 
   // grid size
   figsensor.gridsize[0] = 2;
@@ -435,8 +435,7 @@ void sensorupdate(mj::Simulate* sim) {
     }
 
     // update linepnt
-    figsensor.linepnt[lineid] = mjMIN(mjMAXLINEPNT-1,
-                                       figsensor.linepnt[lineid]+2*dim);
+    figsensor.linepnt[lineid] = mjMIN(mjMAXLINEPNT-1, figsensor.linepnt[lineid]+2*dim);
   }
 }