fix CRAN note (HTML validation problems)

Author: pvictor

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: fresh
 Title: Create Custom 'Bootstrap' Themes to Use in 'Shiny'
-Version: 0.2.1
+Version: 0.2.1.9000
 Authors@R: c(
   person("Victor", "Perrier", email = "victor.perrier@dreamrs.fr", role = c("aut", "cre", "cph")),
   person("Fanny", "Meyer", role = "aut"),
@@ -32,6 +32,6 @@ Suggests:
     rmarkdown,
     testthat (>= 2.1.0),
     covr
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
 Roxygen: list(markdown = TRUE)
 VignetteBuilder: knitr

R/utils.R

@@ -43,7 +43,7 @@ rd_col <- function(color, label = color) {
     color
   )
   sprintf(
-    "\\ifelse{html}{\\out{<span style='%s'></span>%s}}{%s}",
+    "\\ifelse{html}{\\out{<span style='%s'>&nbsp;</span>%s}}{%s}",
     style, label, label
   )
 }