Separate output when results='hold' in knitr - r

Question

Is there a way to separate or section the output in a {r results='hold'} block in knitr without needing to manually insert a print('--------') command in between or the like? I want to avoid such extra print lines is that it makes the code much harder to read.
For example, you need to be quite trained to see where the output from one line stops and the next begins in the output from this:
```{r, results='hold'}
summary(lm(Sepal.Length ~ Species, iris))
#print('-------------') # Not a solution
summary(aov(Sepal.Length ~ Species, iris))
```
Output:
Call:
lm(formula = Sepal.Length ~ Species, data = iris)
Residuals:
Min 1Q Median 3Q Max
-1.6880 -0.3285 -0.0060 0.3120 1.3120
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 5.0060 0.0728 68.762 < 2e-16 ***
Speciesversicolor 0.9300 0.1030 9.033 8.77e-16 ***
Speciesvirginica 1.5820 0.1030 15.366 < 2e-16 ***
---
Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Residual standard error: 0.5148 on 147 degrees of freedom
Multiple R-squared: 0.6187, Adjusted R-squared: 0.6135
F-statistic: 119.3 on 2 and 147 DF, p-value: < 2.2e-16
Df Sum Sq Mean Sq F value Pr(>F)
Species 2 63.21 31.606 119.3 <2e-16 ***
Residuals 147 38.96 0.265
---
Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Maybe some knitr option or a more general R printing option?