diff --git a/R/kable_styling.R b/R/kable_styling.R
index f3f9136..5dc7c25 100644
--- a/R/kable_styling.R
+++ b/R/kable_styling.R
@@ -502,7 +502,7 @@
   # fontsize is good enough
   return(paste0(
     "\\begingroup\\fontsize{", font_size, "}{", row_height, "}\\selectfont\n", x,
-    "\\endgroup{}"
+    "\n\\endgroup{}"
   ))
 }
 
diff --git a/R/print.R b/R/print.R
index 7752d98..344d43d 100644
--- a/R/print.R
+++ b/R/print.R
@@ -10,7 +10,7 @@
   if (interactive() & rstudioapi::isAvailable()) {
     htmltools::html_print(html_result, viewer = rstudioapi::viewer)
   }
-  print(html_result)
+  # print(html_result)
 }
 
 #' HTML dependency for js script to enable bootstrap tooltip and popup message
diff --git a/docs/awesome_table_in_html.Rmd b/docs/awesome_table_in_html.Rmd
index 3af994c..8e9f38f 100644
--- a/docs/awesome_table_in_html.Rmd
+++ b/docs/awesome_table_in_html.Rmd
@@ -173,16 +173,17 @@
 It is very easy to use `cell_spec` with conditional logic. Here is an example.
 ```{r, message=FALSE, warning=FALSE}
 library(dplyr)
+options(knitr.table.format = "html") 
 mtcars[1:10, 1:2] %>%
   mutate(
     car = row.names(.),
-    mpg = cell_spec(mpg, color = ifelse(mpg > 20, "red", "blue")),
-    cyl = cell_spec(cyl, color = "white", align = "c", angle = 45, 
+    mpg = cell_spec(mpg, "html", color = ifelse(mpg > 20, "red", "blue")),
+    cyl = cell_spec(cyl, "html", color = "white", align = "c", angle = 45, 
                     background = factor(cyl, c(4, 6, 8), 
                                         c("#666666", "#999999", "#BBBBBB")))
   ) %>%
   select(car, mpg, cyl) %>%
-  kable(escape = F) %>%
+  kable(format = "html", escape = F) %>%
   kable_styling("striped", full_width = F)
 ```
 
diff --git a/docs/awesome_table_in_html.html b/docs/awesome_table_in_html.html
index a2b79c7..67ba962 100644
--- a/docs/awesome_table_in_html.html
+++ b/docs/awesome_table_in_html.html
@@ -1962,16 +1962,17 @@
 <h2>Conditional logic</h2>
 <p>It is very easy to use <code>cell_spec</code> with conditional logic. Here is an example.</p>
 <pre class="r"><code>library(dplyr)
+options(knitr.table.format = &quot;html&quot;) 
 mtcars[1:10, 1:2] %&gt;%
   mutate(
     car = row.names(.),
-    mpg = cell_spec(mpg, color = ifelse(mpg &gt; 20, &quot;red&quot;, &quot;blue&quot;)),
-    cyl = cell_spec(cyl, color = &quot;white&quot;, align = &quot;c&quot;, angle = 45, 
+    mpg = cell_spec(mpg, &quot;html&quot;, color = ifelse(mpg &gt; 20, &quot;red&quot;, &quot;blue&quot;)),
+    cyl = cell_spec(cyl, &quot;html&quot;, color = &quot;white&quot;, align = &quot;c&quot;, angle = 45, 
                     background = factor(cyl, c(4, 6, 8), 
                                         c(&quot;#666666&quot;, &quot;#999999&quot;, &quot;#BBBBBB&quot;)))
   ) %&gt;%
   select(car, mpg, cyl) %&gt;%
-  kable(escape = F) %&gt;%
+  kable(format = &quot;html&quot;, escape = F) %&gt;%
   kable_styling(&quot;striped&quot;, full_width = F)</code></pre>
 <table class="table table-striped" style="width: auto !important; margin-left: auto; margin-right: auto;">
 <thead>
@@ -3548,7 +3549,7 @@
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@@ -3637,7 +3638,7 @@
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@@ -3645,7 +3646,7 @@
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@@ -3656,7 +3657,7 @@
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@@ -3664,7 +3665,7 @@
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@@ -3672,7 +3673,7 @@
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-1
+0
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 </tbody>
diff --git a/docs/awesome_table_in_pdf.pdf b/docs/awesome_table_in_pdf.pdf
index 90d7b15..b7ed6e8 100644
--- a/docs/awesome_table_in_pdf.pdf
+++ b/docs/awesome_table_in_pdf.pdf
Binary files differ